H12-261-ENU Huawei Free Practice Test

Posted by: Pdfprep Category: Huawei Online Questions Tags: H12-261-ENU Online Questions Post Date: March 10, 2021

Pdfprep2021-03-10T16:35:55+00:00

Pdfprep offers questions and answers about H12-261-ENU exam from all the topics covered in the syllabus. The H12-261-ENU prep questions are carefully formulated by various IT experts, therefore approving them for use. The questions and answers in the H12-261-ENU preparation are usually expressed in a more simplified manner that you can easily understand, and resembles Huawei format. You will easily pass if you manage to go through all the questions and answers presented in the Pdfprep.

Page 1 of 28

1. Which of the following statements is true regarding OSPF adjacencies and link-state database synchronization?

Full adjacency occurs when OSPF routers reach the LOADING state.

The adjacency relationship begins in the EXSTART state.

All OSPF neighbors establish adjacencies in the FULL state with all other routers on the broadcast network.

The INU state indicates that a router has received a Hello packet from a neighbor and has seen their own ROUTERID in the Hello packet.

2. We can use basic community-filters or advanced community-filters to filter BGP routes.

Which of the following tools make the advanced community-filter more flexible than the basic community- filters?

IP-prefix

AS-path-filter

Regular expression

ACL

3. ICMFV6 uses the type field to identify packet types. Based on values of the type field, ICMPv6 packets are classified into two types: error packets and information packets.

TRUE

FALSE

4. Which of the following scenarios can an AS-path-filter be used for? (Multiple Choice)

Filtering the routes received from a BGP peer based on the as-path attributes of the routes, for example, peer

X as-path-filter import

Filtering the routes sent to a BGP peer based on the as-path attributes of the routes, for example, peer

X as-path-filter export

Apply clauses in a route-policy

If-match clauses in a route-policy

5. What are the common methods of learning routing information for BGP? (Multiple Choice)

Importing direct routes

Importing static routes

Importing routes of BGP in other AS

Receiving the routes advertised by peers

6. When configuring Low Latency Queuing (LLQ), a bandwidth parameter is needed.

What does this parameter specify?

Provide a built-in policy manager to restrict the maximum available bandwidth of latency-sensitive queues during congestion.

This parameter is optional, since the LLQ will always have precedence over other queues.

This parameter should be as low as possible. It represents bandwidth which will always be reserved. It reduces the amount of bandwidth on the interface, even if it is not used by any LLQ traffic.

It represents the reference CIR to calculate the burst size of the token bucket of the built-in policer.

7. A DHCP server can allocate an IP address based on a host's MAC address or the port of access switch the host connect to.

TRUE

FALSE

8. According to configurations in the following figure, the two routers can establish a normal IS-IS neighbor relationship.

TRUE

FALSE

9. An IPv6 device with the address of FC00::1 connects to the network and captures the following data packet.

What is function of the data packet?

The IPv6 device implements self-loop tests.

The router on this network segment tests the working status of the IPv6 device.

Another device on this network segment requests to resolve the Layer 2 address of the IPv6 device.

The IPv6 device checks address configuration of other devices on the network.

There are multiple routers on the network segment. One router advertises router redirect messages to the IPv6 device.

The IPv6 device requests the address of the egress router.

10. What are the key components of NAC? (Multiple Choice)

Communications proxy

NAC device

Access terminal

Policy server

Page 2 of 28

11. Which of the following statements is true about the port mirroring on Huawei devices?

Huawei devices support port mirroring on the control traffic sent to the CP

When the observing port becomes congested, mirrored packets cannot be discarded because these packets have higher priority than service traffic.

Huawei devices support flow-based port mirroring. The mirrored traffic can be copied onto multiple observing ports.

Traffic in the RSPAN is transmitted to observing ports in multicast mode.

12. Which of the following route selection tools is BGP-specific?

Route-policy

IP-prefix

AS-path-filter

ACL

13. Which access control modes are provided by NAC? (Multiple Choice)

802.1x authentication

AAA authentication

MAC address authentication

Web authentication

14. An AS-path-filter uses the regular expression ^[0-9]+$ to indicate all as-path attributes.

TRUE

FALSE

15. HW is an ISP providing MPLS services according to RFC 4364 standards. By using a unique route distinguisher per VRF, this L3 VPN service provides the ability for which of the following?

Unique IGP per VRF

Multi-homed access

Traffic Engineering

Overlapping IP Address space

16. A router running RIP Version 2 has two interfaces and has received RIP routing updates from its neighbors on both interfaces. The first interface receives a routing update for network 10.1.1.0/24 with a metric of 3, the second interface also receives a routing update for network 10.1.1.0/24 with a metric of 5.

Which interface(s) will the router select to forward packets to network 10.1.1.0/24?

The router will choose the first interface because it has the lowest metric.

The router will load share across both interfaces in a weighted fashion, sending the first 3 packets out of the first interface, and the next 5 packets out of the second interface.

The router will choose the second interface because it has the highest metric.

The router will equally load share packets across both interfaces in a round robin fashion, because both are valid RIP Version 2 routes.

The router will ignore the RIP metrics and compare the preference value of each route, and choose the interface with the lowest preference value.

17. On an MPLS VPN network, some devices maintain VPN routing information and private network label information to ensure correct forwarding of VPN packets. These devices must run not only routing protocols, but also MP-BGP and MPLS protocols.

What type are these devices?

Host

18. Which of the following statements are true about BGP4+ configurations? (Multiple Choice)

The BGP4+ router ID is the same as the BGP4 router I

BGP4+ must use the local link address to specify a peer.

The next hop of BGP4+ routes does not use the local link address.

When configuring a reflector using BGP4+, role positioning of the reflector and client must be consistent with configurations of BGP4.

BGP4+ does not support a route reflector.

19. Routers HW1 and HW2 are IP Multicast routers. These routers use (S, G) entries for multicast packet forwarding.

Which of the following address types are used in the "S" entry?

Source Specific multicast addresses

The block of administratively scoped multicast addresses

SDP / SAP addresses

Any class A, Class B, or Class C host address

GLOP addresses

20. Devices on the HW Multicast network must send source specific multicast (SSM) messages.

What range of IP multicast addresses are reserved by the IAN A for source-specific multicast?

232.0. 0.0-232.0.0.255

233.0. 0.0-233.255.255.255

232.0. 0.0-232.255.255.255

239.0. 0.0-239.255.255.255

Page 3 of 28

21. When you perform troubleshooting on a LAN deployed with Huawei devices, you find that there is a large number of unicast frames with unknown MAC addresses.

What is the biggest risk for the switches?

Available MAC address table entries in the system will be consumed.

Increased power consumption.

Exhausts memory for buffered frames.

Exhausts available TCAM entries.

Exhausts available bandwidth.

22. Serial 0 on a router is an OSPF network in area 1. You configure serial 0 as silent.

What is the effect of this configuration change?

OSPF will accept the routing updates from neighbors.

OSPF will form all the available adjacencies on that interface.

OSPF will not insert any of the learned routes in the local routing table.

OSPF will not form any adjacencies on that interface.

23. Which of the following is true about Class based Weighted Fair Queuing (CBWFQ)?

CBWFQ provides delay, jitter, and bandwidth guarantees to traffic.

CBWFQ can be configured on any interface in either input or output.

CBWFQ has to be configured with the Modular QoS CL

The resulting service-policy must be applied on output.

CBWFQ can only be configured in a hierarchical policy-map. The parent policy-map implements policing and the child policy-map implements CBWF

24. In IPTV services, video streams are transmitted in multicast mode. When a user changes channels, the multicast traffic of the original TV program is still sent for a certain period. This situation worsens when the user frequently changes channels.

Which protocol is recommended to reduce the useless traffic?

IGMPv1

IGMPv2

MLD

GVRP

IGMP snooping

25. Which of the following are valid IPv6 Address Types? (Multiple Choice)

Broadcast

Multicast

Anycast

Unicast

26. If a router receives a BGP route carrying the no-export community attribute, which of the following actions does the router take?

Discards the route directly.

Does not advertise the route to other BGP routers.

Advertises the route to IBGP peers only.

Advertises the route normally, but does not use it to forward data.

27. The IS-IS authentication functions include interface authentication, area authentication, and routing domain authentication.

TRUE

FALSE

28. What is the destination IP address of routing update packets sent by RIPv2?

224.0.0.5

224.0.0.1

255.255.255.255

224.0.0.10

224.0.0.9

29. What are the advantages of WRED? (Multiple Choice)

Completely eliminates congestion

Avoids TCP synchronization

Provides minimal bandwidth guarantees

Provides bounded low latency

WRED can prevent UDP from occupying too much bandwidth during congestion

30. Which of the following are differences between PIM-SM and PIM-DM? (Multiple Choice)

PIM-SM is applicable to a network with few receivers; PIM-DM is applicable to a network with a larger number of receivers.

BSRs/RPs exist only on a PIM-SM network, not on a PIM-DM network.

Whether in PIM-SM or PIM-DM mode, receiver hosts must join multicast groups through IGM

PIM-SM has RFTs and SFTs but PIM-DM has only RFTs.

Page 4 of 28

31. HW is using Sparse Mode PIM within its IP multicast network.

In PIM-SM, what control plane signaling must a multicast source perform before it begins to send multicast traffic to a group?

The source must perform a "Request to send" (RTS) and "Clear to send" (CTS) handshake with the PIM Designated Router (DR) on the local subnet.

The source sends a PIM register message to the Rendezvous Point (RP).

The source must first join the multicast group using IGMP before sending.

No control plane signaling is required. The source just begins to send on the local subnet.

32. Router HW is running OSPF and it is an ABR. Router HW is configured with the abr-summary command.

Which of the following types of LSA will be summarized? (Multiple Choice)

Type 1

Type 2

Type 3

Type 4

Type 5

33. With regard to PPPoA, which of the following statements are true? (Multiple Choice)

PPPoA contains information about NCP LCP and supports all AA

PPPoA is not a standard based protocol.

PPPoA uses adaptation layer 5 (AAL5) as the framed protocol and is used primarily in xDS

In PPPoA architecture, IP address allocation for the subscriber CPE uses IPCP negotiation.

PPPoA supports all ppp feature except password PAP CHA

34. The network administrator defines the following policy for traffic policing:

If the policy is applied to a router port and there is no traffic on the port for about 10 seconds, how many bytes of burst will be available for class cl for packets to be marked as green?

256K bytes

32K bytes

48128 bytes

80128 bytes

35. Which set of characteristics best describes Link-State routing protocols?

Fast convergence and lower CPU utilization

High CPU utilization and prone to routing loops

Slower convergence time and high CPU utilization

Fast convergence and greater CPU utilization

36. As shown in the following figure, the content field of an HVRP frame contains all valid user VLAN information.

TRUE

FALSE

37. Suppose you are using RIP or OSPF to deploy a network.

Which of the following is true?

If RIPv2 is used to deploy the network, routes whose measurement values are 16 cannot be viewed in the routing table.

RIPV2 sends route update information periodically. Therefore, when the topology changes, RIPv2 is able to calculate the new route more rapidly.

RIPv1 is a distance vector routing protocol. RIFV2 and OSPF are link-state routing protocols.

RIP does not support authentication, while OSPF supports authentication.

38. When a router is building a routing table from different routing protocols, which of the following will determine the routes to be installed in the routing table?

Higher preference value

Low Router ID

The route with the largest next-hop address

The fastest routing process

uniqueness

39. uRPF checks can be performed in loose or strict mode. In tough network environments under frequent attacks, the strict uRPF check mode is recommended. In well-managed internal network environments, the loose uRPF check mode can be used to save device resources.

TRUE

FALSE

40. In Rapid Spanning Tree Protocol (RSTP), when will a BPDU be aged out?

After BPDU Age reaches Hello time

After BPDU Age reaches Forword Delay

RSTP does not age out BPDU information on ports

After BPDU Age reaches Max Age

After 6 seconds

Page 5 of 28

41. RSVP is implemented in the following processes: R1 sends Path messages to request bandwidth reservation to its downstream node R2. After receiving the request, R2 responds to R1 through Resv (short for "Reservation") messages. R2 then sends Path messages to request bandwidth reservation to its downstream node R3. This process repeats until reach the egress router.

TRUE

FALSE

42. Router HW1 is seeing a large number of Discard Eligible (DE) frames. In Frame-relay, as part of the Congestion-Control Mechanism, the DE bit works in conjunction with which of the following mechanisms?

Forward Explicit Congestion Notification (FECN) or Backward Explicit Congestion Notification (BECN) settings

Class-of-Service (CoS) settings

Type-of-service (ToS) settings

Frame-relay Traffic Shaping (FRTS) settings

Differentiated Services Code Point (DSCP) settings

43. When connecting a switch to another switch using Ethernet ports, what pinouts should be used?

1->3, 2->6, 3->1, 6->2

1->1, 2->2, 3->3, 6->6

1->4, 2->5, 4->1, 5->2

1->5, 2->4, 4->2, 5->1

1->6, 2->3, 3->2, 6->1

44. Which of the following statements are true? (Multiple Choice)

Multicast use UDP to carry traffic instead of TC

Multicast technology can be used for all "one-to-many" data transmission applications.

Multicast technology can ensure reliable packet transmission because it is based on TCP connections.

Multicast technology can reduce redundant traffic and hence save network bandwidth.

45. In a data communication session between two hosts, the session layer in the OSI model generally communicates with what other layer of the OSI model?

The peer's presentation layer

The physical layer of the peer

The peer's session layer

The data link layer of the peer

The peer's application layer

46. A new Syslog server is being installed in the HW network to accept network management information.

What characteristics apply to these Syslog messages? (Multiple Choice)

Its transmission is reliable.

Its transmission is secure.

Its transmission is acknowledged.

Its transmission is not reliable.

Its transmission is not acknowledged.

Its transmission is not secure.

47. IPv6 adopts a solicited-node address.

Which of the following statements is true about the address?

The solicited-node address is a specific address that is used to resolve MAC addresses in ARPv6,

The solicited-node address of an interface on a router is generated automatically. Multiple solicited-node addresses are allowed,

If no solicited-node address is configured, the router will automatically generate an address for each interface.

IPv6 adopts the solicited-node address to support IPv6 multicast.

48. You are troubleshooting a frame relay problem with the serial0 interface on one of your HW routers. When the interface is brought up, it stays up for a short time before it goes back down. You issue the show interface command, and from this you can see that your interface shows LMI status messages sent, but none received.

What could be the problem?

There are too many input errors on the line.

The Frame-Relay lmi-type is set incorrectly.

There are too many configured sub-interfaces, causing the IDB limit to be exceeded.

The DCD is not set correctly for a Frame-Relay circuit.

Keepalives are not set correctly on both ends.

49. What SNMP message type reports events to the NMS reliably?

Get

Response

Inform

Trap

Get Bulk

50. Which of the following tools can be used when IS-IS filters routes?

community-filter

access-list

policy-based-route

as-path-filter

Page 6 of 28

51. Two BGP peers connected through a routed firewall are unable to establish a peer relationship.

What could be the most likely cause?

BGP peers must be Layer 2-adjacent.

EBGP multihop is not configured.

The firewall is not configured to allow IP protocol 89.

The firewall is not configured to allow UDP 179.

52. A new HW office needs to use its router as a DHCP server.

Which of the following statements are true about configuring the DHCP Server to handle DHCP in this HW office? (Multiple Choice)

Configure Manual Bindings

Configure a DHCP address pool

Configure a DHCP server boot file

Exclude IP Addresses not to be used in DHCP scopes

Configure the timeout value for Ping Packets

53. On a BGP/MPLS IPv4 VPN, OSPF, LDP, and static routes are configured.

Which of the following protocols must be enabled with GR to achieve NSF on PEs? (Multiple Choice)

OSPF

MPLS LDP

BGP

Static routes

54. Regular expressions can be used in both the community-filter and AS-path-filter to match the attributes for route filtering.

TRUE

FALSE

55. Router HW1 is configured for OSPF, interface serial 0 is configured to be in area 0, and interface serial 1 is configured to be in area 1.

What will the Rouer HW1 do when area 1 is NSSA? (Multiple Choice)

HW1 will inject a type 3 default route into area 1.

HW1 will inject a type 7 default route into area 1.

HW1 will inject a type 7 default route into area 0.

HW1 needs a default route in its routing table to inject a default into area 1.

HW1 does not need a default route in its routing table to inject a default into area 1.

56. Which of the following statements are true regarding the SPF calculation? (Multiple Choice)

SPF algorithm is also known as Dijkstra algorithm.

SPF algorithm is also known as Bellman-Ford algorithm.

When calculating the SPT, the router uses itself as the root to establish an SPF tree.

When calculating the SPT, the router uses the target network segment as the root to establish an SPF tree.

57. A new HW user is complaining about poor network performance from her PC.

Poor performance, collisions, and intermittent communication problems between a PC and a switch port may be the result of which of the following?

Using the wrong cable category

Mismatching duplex modes

The port being errdisabled on the switch

Mismatching speeds

58. Which of these statements about PIM join messages in classic PIM-SM is true?

PIM join messages are sent every 60 seconds to refresh the upstream router's mroute state for the multicast tree.

Routers send a PIM join acknowledgement in response to each PIM join message received from a downstream router.

PIM join messages are only sent when the multicast distribution tree is being established.

PIM join messages are sent every three minutes to refresh the upstream router's mroute state for the multicast tree.

59. The HW network is being used to provide MPLS VPN services to its customers.

In an MPLS label within this network, if the stack bit is set to 1, which of the following statements is correct?

The stack bit is a Huawei-only implementation and is only used when LDP is the label distribution protocol.

The stack bit is reserved for future use.

The stack bit is only used when LDP is the label distribution protocol.

It signifies that this is the top entry in the label stack and remains set to 1 until only the last entry, when the bottom label is reached.

It signifies the last entry in the label stack.

60. Each DD packet has a DD sequence number for packet acknowledgment. A DD sequence number is two-bytes long.

TRUE

FALSE

Page 7 of 28

61. Which of following statements is true about IS-IS route leaking?

IS-IS route leaking can be applied only in IPv4 environments.

IS-IS route leaking can prevent secondary paths.

IS-IS route leaking must be deployed on Level-1 routers.

IS-IS route leaking is enabled by default.

62. Layer 6 of the OSI model is responsible for which of the following functions?

Common data compression and encryption schemes

Establishing, managing, and terminating communication sessions

Synchronizing communication

Determining resource availability

63. There are two community-filters:

ip community-filter 1 permit 100:1 200:1

ip community-filter 2 permit 100:1

ip community-filter 2 permit 200:1

Which of the following statements are true? (Multiple Choice)

A BGP route matches community-filter 1 only when the community attributes carried in the route contain both 100:1 and 200:1.

A BGP route matches community-filter 1 as long as the community attributes carried in the route contain 100:1 or 200:1, or both.

A BGP route matches community-filter 2 only when the community attributes carried in the route contain both 100:1 and 200:1.

A BGP route matches community-filter 2 as long as the community attributes carried in the route contain 100:1 or 200:1, or both.

64. Which of the following statements are true about the extended features of IS-IS? (Multiple Choice)

IS-IS can choose whether to authenticate and verify the received SNP and LSP packets.

If the link state PDUs to be advertised by IS-IS contain a lot of information, the IS-IS router generates more LSP fragments to carry more IS-IS information.

After the IS-IS LSP fragment extension function is enabled, the IS-IS process does not need to be restarted.

If some devices from other vendors are deployed on the network and these devices do not support the IS-IS LSP fragment extension function, the fragment extension mode must be set to Mode-1; otherwise, the devices from other vendors cannot identify the packets.

65. The network "200.10.10.0/24" requires 3 loopbacks, 2 point to point links, one Ethernet with 50 stations, and one Ethernet with 96 stations.

Which of the options listed below would be the most efficient (for saving IP addresses)?

200.10.10.1/32, 200.10.10.2/32, 200.10.10.3/32, 200.10.10.4/30, 200.10110.8/30, 200.10.10.64/261 200.10.10.128/25

200.10.10.0/32, 200.10.10.1/32, 200.10.10.2/32, 200.10.10.4/31, 200.10.10.8/31, 200.10.10.64/26, 200.10.10.128/25

200.10.10.1/32, 200.10.10.2/32, 200.10.10.3/32, 200.10.10.4/31, 200.10.10.8/31, 200.10.10.64/27, 200.10.10.128/26

200.10.10.1/31, 200.10.10.2/31, 200110.1013/31, 200.10.10.4/30, 200.10.10.8/30, 200.10.10.64/27, 200.10.10.128/26

There are not enough addresses available on that network for these subnets.

66. You are troubleshooting problems on the LAN and suspect duplex mismatches.

Which switch port errors are an indication of a duplex mismatch on a 10/100/1000 IEEE 802.3u Gigabit Ethernet port? (Multiple Choice)

Alignment Errors

FCS Errors

Jumbo frames

Runts

Excessive Collisions

Late Collisions

67. What are the functions of the Hello message in PIM-SM? (Multiple Choice)

To establish and maintain neighbor relationships

Advertises BSR/RP information

To elect a DR and a BDR

To negotiate parameters between neighbors

68. The ip ip-prefix ip-prefix-name [ index index-number ] { permit | deny } ipv4-address mask-length [ greater-equal greater-equal-value ] [ less-equal less-equal-value ] command is used to configure an IP-prefix-filter.

If less-equal is specified but greater-equal is not, what is the prefix range?

[0, less-equal-value]

[mask-length, less-equal-value]

[less-equal-value, 32]

Not limited

69. Which of the following statements is true about the database synchronization process on an IS-IS broadcast network?

As the DIS, R2 sends a CSNP packet periodically.

The interval at which R2, as the DIS, sends Hello packets is three times that of other routers.

As the DIS, R2 does not receive the PSNP requests from other routers.

R1 and R3 maintain the database consistency by sending PSNP packets periodically.

70. The router HW1 is being configured for BGP, and the configuration will contain both IBGP and EBGP peers.

Which statements regarding IBGP and EBGP neighbors are true? (Multiple Choice)

BGP updates from an IBGP peer are propagated to other IBGP and EBGP peers.

BGP updates from an EBGP peer are propagated to other IBGP and EBGP peers.

IBGP peers must be directly connected; if not, the IBGP-multihop option must be configured.

EBGP peers must be directly connected; otherwise, the EBGP-multihop option must be configured

IBGP neighbor peering can be established using the loopback interface.

EBGP neighbor peering must use the physical interface address to establish peering.

Page 8 of 28

71. With regard to the File Transfer Protocol (FTP), which of the following statements is true?

FTP always uses TCP port 20 for the data session and TCP port 21 for the control session.

FTP always uses one TCP session for both control and data.

In active mode, the server uses the "PORT" command to tell the client which port it will used to send data.

With passive mode FTP, both the control and data TCP sessions are initiated by the client.

FTP always uses TCP port 21 for the data session and TCP port 20 for the control session.

72. Which of the following statements are true about the IPv6 over IPv4 tunnel? (Multiple Choice)

Generally, a tunnel interface is created when configuring a manual tunnel on the VRP platform. A Virtual-Template interface is created when configuring an automatic tunnel.

Automatic tunnels have many more advantages than manual tunnels. The manual tunnels will be phased out.

A 6-to-4 automatic tunnel requires a specific IPv6 address segment. The prefix of the allocated address segment is 3ffe::/16.

The data encapsulation mode of all automatic tunnels is the same.

An ISATAP tunnel determines the destination IPv4 address based on the destination IPv6 address.

73. You must ensure that mission critical traffic is prioritized in the HW network.

The IP precedence of a packet can be determined by which of the following?

All 8 bits of the ToS byte

Bits 4, 5, and 6 of the ToS byte

The three least significant bits of the ToS byte

The three most significant bits of the ToS byte

74. An HW network administrator is using private IP addresses for the company network with many to one NAT to allow users Internet access.

When a web server is added to the network, what must the network administrator do to allow outside users access to the web server via the Internet?

Use a dynamic mapping with the reverse key worth.

Place the server's internal IP address in the external NAT records.

Ensure a static one to one NAT entry for the web server's address.

Nothing more needs to be done as dynamic NAT is automatic.

Place the server's IP address into the NAT pool.

75. To advertise the network 190.72.27.0/27 to an EBGP peer, what command should you use?

network 190.72.27.0

network 190.72.27.0 mask 255.255.255.224

network 190.72.27.0 255.255.225.240

network 190.72.27.0 255.255.255.224

network 190.72.27.0 0.0.0.31

76. Which of the following statements about the ASM model and the SSM model are true? (Multiple Choice)

In the SSM model, receivers know the location of multicast sources in advance by certain means.

In the ASM model, receivers do not know the location of multicast sources in advance.

For receivers, the SSM model is better than the ASM model.

The ASM and SSM models use different IP multicast address ranges.

77. Spanning Tree Protocol calculates path cost based on which of the following?

Interface bandwidth

Interface delay

Interface bandwidth and delay

Hop count

Bridge priority

78. IPv6 multicast introduces the concept of multicast scope.

Which of the following methods implements multicast scope?

There is a specific field in the IPv6 multicast address to specify the multicast forwarding scope.

When a multicast source sends IPv6 multicast data, the multicast source sets the TTL value of the data packets to limit the multicast forwarding scope.

When configuring a network, the administrator uses configuration commands on the network edge to limit the multicast scope.

Multicast range is only a concept of the forwarding scope, and it cannot be implemented using technology.

79. What can be said of TTL Propagation when IP propagation has been disabled (MPLS)? (Multiple Choice)

The TTL field of the MPLS label header is set to 255 on the ingress LE

The TTL value of the IP header will not be reduced on the LS

The TTL field of the packet is set to 0.

TTL propagation is only disabled in the ingress edge LS

TTL propagation cannot be disabled in MPLS domain.

80. In the HW MPLS network, which of the following parameters are used to determine a Forwarding Equivalent Class, or FEC? (Multiple Choice)

IP Prefix

Layer 2 Circuit

BGP MED Value

RSVP Request from CE for bandwidth reservation

Page 9 of 28

81. You have been tasked with summarizing the addressing so it can be espressed in the shortest form possible.

The IPv6 address of 2013:0000:130F:0000:0000:09C0:876A:130B can be expressed most efficiently as which of the following?

2013:0:130F:0:0:09C0:876A:130B

2013::130F::9C0:876A:130B

2013:0:130F:0:0:9C0:876A:130B

213::13F::9C:876A:13B

2013:0:130F::9C0:876A:130B

82. Based on the routing information exchange mode, MPLS VPNs are usually classified into two types. One is the overlay VPN.

What is the other type of MPLS VPN?

L2 VPN

L3 VPN

Peer-to-Peer VPN

Virtual Private Network

83. If one end of a cable connects to port G0/0/17 of a switch and the other end to port G0/0/18 of the same switch, with STP enabled.

Which of the following statements is true?

Port G0/0/18 will be discarding.

Both ports will be forwarding.

Port G0/0/17 will be discarding.

Both ports will be discarding.

Port G0/0/18 will continuously move between listening and learning states.

Port G0/0/17 will be stuck in learning state.

84. HW has a Frame Relay network with two sites (a headquarters site and a remote site) connected by a single PVC. RIP version 2 is running in the network. A new remote site is added and HW has ordered a second PVC between this site and the headquarters site. All Frame Relay interface IP addresses are in a single subnet. The customer configured Frame Relay DLCI mappings and can successfully ping from the new remote to the headquarters site as well as to the other remote site. However, the new router does not have a route in its route table to the other remote site's LAN, and cannot ping the LAN interface or any hosts on that LAN.

What is most likely causing the problem?

Neighbor statements are not configured on the two remote sites, pointing to all other sites.

The headquarters site router has split-horizon enabled on the frame-relay interface.

The frame-relay IP to DLCI mappings are incorrectly configured.

RIP cannot propagate routing updates over a partial mesh frame-relay configuration, so another routing protocol should be selected.

Triggered updates should be configured on the headquarters router, to directly forward routing updates between the two remote sites.

85. Which of the following statements is true about the IS-IS operation on the Ethernet?

IS-IS uses multicast mode to exchange and control information on the Ethernet.

When IS-IS elects DIS on the Ethernet, the comparison rule is that a higher interface priority

indicates a higher DIS priority. If the priorities are the same as each other, compare the system I

On the Ethernet, IS-IS sends a PSNP periodically to maintain database integrity.

On the Ethernet, IS-IS establishes a secure and reliable neighbor relationship using the three-way handshake.

86. Which of the following statements about VRRP load balancing are true? (Multiple Choice)

Multiple VRRP backup groups can be created on an interface of a router. The router can serve as the master router in one VRRP backup group and the backup router in other VRRP backup groups.

VRRP local balancing requires that at least two virtual routers transmit services at the same time.

To implement load balancing, default network gateways of hosts on a LAN must be configured as IP addresses of different virtual routers.

When configuring priorities, you must ensure that the same router serves as the master router in three VRRP backup groups.

87. RSVP is implemented in the following processes: R1 sends Path messages to request bandwidth reservation to its downstream node R2. After receiving the request, R2 responds to R1 through Resv (short for "Reservation") messages. R2 then sends Path messages to request bandwidth reservation to its downstream node R3. This process repeats until reach the egress router.

TRUE

FALSE

88. Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer?

Prefixes received from any other BGP peer and prefixes locally originated via network statements or redistributed to BGP

All prefixes in its IP routing table

Only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed

Only prefixes received from EBGP peers and prefixes received from route reflectors

All prefixes in its routing table except the prefixes received from other EBGP peers

All prefixes in its routing table except the prefixes received from other IBGP peers

89. Routers R1 and R2 are configured for BGP. Both routers are in AS 65234. Routes from Router R2 are in the BGP table on Router R1, but not in the IP routing table.

What could be the cause of this problem?

Synchronization is off.

The BGP peers are down.

BGP multi-hop is disabled on Router R1.

The next-hop of these routes can not reach by router R1.

90. When an IP packet is Layer 3-switched from a source in one VLAN to a destination in another VLAN, what field in a packet will be rewritten?

Layer 3 destination address

Layer 3 source address

Layer 2 TTL

Layer 3 TTL

Layer 3 Transport Protocol

Page 10 of 28

91. Which types of messages are sent from the NMS (Network Management Station) to the Agent using SNMP version 1?

Trap, Get and Set

Get, Set and Getnext

Get, Set, Getnext and GetBulk

Get, Set and GetBulk

Trap only

92. Switches use IPSG to verify the source address of IP packets. IPSG obtains the binding table by listening to the address resolution process.

TRUE

FALSE

93. You want to mark all VoIP packets in the HW network with the DSCP value of EF.

According to the differentiated services RFCs, traffic with Expedited Forwarding Per Hop Behavior should be marked as:

DSCP decimal 36

IP ToS of 0xEF

IP Experimental ECN

DSCP decimal 5

Binary Value of 101110

94. Which STP timer determines how often the root bridge sends configuration BDPUs?

STP Timer

Hold Timer

Hello Timer

Max Age Timer

Forward Delay Timer

95. While troubleshooting a LAN network, you notice a large number of alignment errors, FCS Errors, and late collisions.

This may indicate which of the following?

A half-duplex connection between the switch and an end-point on a 10/100/1000Base-T Ethernet link

Normal errors under most circumstances

There is a duplex mismatch on a 1000Base-LX/LH Ethernet link

There is a duplex mismatch on a 10/100/1000Base-T Ethernet link

96. A network administrator prepares to enable the IPv4 network to bear IPv6 data by using 6-to-4 automatic tunnels. If the IPv4 address of router interfaces is 138.14.85.210, the corresponding tunnel address is 2001:8a0e:55d2:1:230:65ff:fe2c:9a6.

TRUE

FALSE

97. Which of the following statements is false about the DSCP field?

CS in DSCP classifies data based on eight priorities.

DSCP can represent the data priority as well as the packet drop probability.

The DSCP value can be 0. When the value is 0, the default packet forwarding mechanism is used.

When the DSCP value is EF, data is forwarded in expedited forwarding mode.

98. A network often encounters ARP attacks.

Which of following technologies can be used to prevent these attacks? (Multiple Choice)

DAI

DHCP snooping

uRPF

Static MAC address binding

Port isolation

99. What is the primary purpose for the RPF check in IP multicast networks?

To establish reverse flow path of multicast traffic from the receiver to the source

To prevent multicast traffic looping through the network

To determine interface inclusion in the outgoing interface list

To prevent the movement of unauthorized multicast traffic

100. Which attributes meet the following two conditions: (1) A BGP router (Router A) can choose whether to carry this attribute in an Update packet. (2) If a receiving router (Router B) cannot identify this attribute, this router can advertise this attribute to another BGP router (Router C).

Router C may be able to identify and use this attribute. (Multiple Choice)

Aggregator

Local_Pref

Multi_Exit_Disc

Community

Page 11 of 28

101. As shown in the following figure, in IPv4 and IPv6 environments the SEL value in an IS-IS NET address is always 00.

TRUE

FALSE

102. A company rents a frame relay line with 1 Mbps CIR from the carrier. But the line is unstable and flapping frequently. The network administrator finds that the CIR value is not configured on the router. After correcting this error, the line will become stable.

TRUE

FALSE

103. The default SSM group address range is 232.0.0.0/8.

Which of the following configurations can be performed to modify the SSM group address range?

Run the ssm-policy basic-acl-number command in the system view to configure the SSM group address range.

Run the ssm-policy advanced-acl-number command in the system view to configure the SSM group address range.

Run the ssm-policy basic-acl-number command in the PIM view to configure the SSM group address range.

Run the ssm-policy advanced-acl-number command in the PIM view to configure the SSM group address range.

104. On router HW1, you want to view the status of a frame relay connection.

Which "display" commands will show the status of a Frame-Relay PVC? (Multiple Choice)

display frame relay pvc

display fr interface Serial 0/0/0

display fr inarp-info

display fr Imi-info

display fr map-info interface Serial 0/0/0

display frame relay interface

105. On VRP, an ACL has multiple matching rules.

Which of the following statements is true about the matching sequence?

By default, rules are matched in ascending order of rule IDs.

By default, permit rules are matched before deny rules.

By default, rules are matched according to the depth first principle.

There is only one matching sequence and it cannot be changed.

106. An IS-IS neighbor relationship can be established on a P2P network as long as Hello packets are exchanged twice.

TRUE

FALSE

107. The figure describes the IPv6 network topology and address allocation. IPv6 and RIPng are applied to the entire network.

The IPv6 routing table on R2 would match the output shown below the diagram:

TRUE

FALSE

108. What should be configured on redundant routers to support the need for a default gateway on LAN network hosts when there are two gateway routers providing connectivity to the rest of the network?

DHCP

RIP

OSPF

VRRP

BOOTP

109. A branch office uses Telnet and FTP to access an application at the main office over a 256k PPP link.

What compression type will provide the best performance improvement?

Compressed Real-time Transport Protocol

TCP header compression

Stacker compression

Predictor compression

110. The IP precedence of a packet can be determined by which of the following?

All 8 bits of the ToS byte

Bits 4,5, and 6 of the ToS byte

The three most significant bits of the ToS byte

The three least significant bits of the ToS byte

Page 12 of 28

111. Which of the following as-path attributes does NOT match this AS-path-filter?

ip AS-path-filter 1 permit ^100(_100)*(_400)*$

100

100 200 400

100 400

100 400 400 400

112. In order to increase network availability in the HW OSPF network, graceful restart was implemented.

When using OSPF Graceful Restart, which mechanism continues forwarding packets during a switchover?

Layer 2 forwarding

Hardware Based Forwarding

Reverse Path Forwarding

UDP Forwarding

Forwarding Address

113. Which of following statements is true about IS-IS LSP fragment extension?

The IS-IS LSP fragment extension function allows an IS-IS router to generate more LSP fragments to carry more IS-IS information.

IS-IS LSP fragment extension also takes effect for Hello packets.

IS-IS LSP fragment extension is implemented by adding virtual systems. The IS-IS LSP fragment can be extended into a maximum of 1000 virtual systems.

IS-IS routers can generate a maximum of 1024 fragments.

114. A change in network topology causes the flooding operation.

Which OSPF packet type is used in LSA flooding?

Hello

Link State Update

Link State Request

Database description

Link State Acknowledgement

115. Similar to ACLs, packet filtering firewalls filter data packets based on headers of network and transmission layer packets.

TRUE

FALSE

116. On a RIPng network, configure a router to advertise the default route to the entire network.

Which of the following configurations is correct?

[Huawei]ripng 1 [Huawei-ripng-1]import-route static cost 2 [Huawei-ripng-1]quit

[Huawei]ipv6 route-static:: 0 NULL0 [Huawei]interface GigabitEthernet0/0/1 [Huawei-GigabitEthernet0/0/l]ipv6 enable [Huawei-GigabitEthernet0/0/l]ipv6 address 2001:12::1/64 [Huawei-GigabitEthernet0/0/l]ripng 1 enable [Huawei-GigabitEthernet0/0/l]ripng default-route originate [Huawei-GigabitEthernet0/0/l]quit

[Huawei]ripng 1 [Huawei-ripng-1] import-route static cost 2 [Huawei-ripng-1]quit [Huawei]ipv6 route-static::0 2001:19: :9

[Huawei]ripng 1 [Huawei-ripng-1]ripng default-route originate [Huawei-ripng-1]quit

117. What is the class D IP address range 239.0.0.0-239.255.255.255 used for?

It is a locally scoped multicast address and should only be used on local segments.

Link-local multicast traffic made up of network control messages meant to stay in the local subnet.

It is an SSM multicast address range which is used on the entire network.

Any legal multicast data flow and multicast application can use this address segment.

It is a multicast address range used by routing protocols.

118. Which of the following statements is accurate regarding OSPF areas?

Import-route is allowed into all types of OSPF areas.

When routes are imported into an OSPF stub area, they enter as type-5 LSAs.

Import-route is allowed into an OSPF stub area, but not into an OSPF totally stub area.

When routes are imported into an OSPF totally stub area, they enter as type-5 LSAs.

When routes are imported into an OSPF totally NSSA area, they enter as type-7 LSAs.

119. On Huawei devices, when IS-IS imports external routes and sets the route information tag, the default metric type does not need to be modified.

TRUE

FALSE

120. Which of following statements is true about VLANs on Huawei Switches?

VLANs cannot be created on devices in batches.

The range of VLAN IDs is from 1 to 4096.

On Huawei switches, VLAN IDs from 4000 to 4010 are reserved by default.

The scope of VLAN usage can be extended using QinQ technology.

Page 13 of 28

121. How are BPDUs handled by 802.1w compared to 802.1D?

802.1w bridges only relay BPDUs received from the root.

802.1D bridges do not relay BPDUs.

802.2D bridges only relay BPDUs received from the root.

There is no difference between 802.1w and 802.1D when they handle BPDUs.

122. For policing and shaping, what is the mathematical relationship between the committed information rate (CIR), committed burst (Be), and committed rate measurement interval (Tc)?

CIR = Tc / Be

CIR = Be /Tc

Tc = CIR / Be

Tc = Be / CIR

123. To implement a multicast video application over your private internal network, you must use a multicast address from the private multicast range.

Which IP range should select from?

224.0.0.0 - 224.255.255.255

226.0.0.0 - 226.255.255.255

241.0.0.0 - 241.255.255.255

239.0.0.0 - 239.255.255.255

240.0.0.0 - 254.255.255.255.

124. Which of the following situations will cause forwarding failure of multicast traffic? (Multiple Choice)

Multicast packets received on non RPF interfaces.

PIM is not enabled on an RPF interface.

The upstream router discards the received PIM Join messages.

On a network with multiple egress routers, the router is not selected as the D

125. In the aggregate ipv4-address { mask | mask-length }[ as-set | attribute-policy route-policy- name1 | detail-suppressed | origin-policy route-policy-name2 | suppress-policy route-policy- name3 ] command, multiple parameters can be specified to affect the route summarization process and results.

Which statements about this command are true? (Multiple Choice)

If as-set is configured, the AS_Path of the generated summarized route contains AS_Paths of all specific routes. This avoids routing loops.

If suppress-policy is configured, the summarized route can be generated, The if-match clauses of the route-policy can be used to selectively suppress specific routes. Those specific routes that match this route-policy will still be advertised to other BGP peers.

If origin-policy is configured, only the specific routes that match the route-policy are used to generate the summarized route.

If attribute-policy is configured, attributes can be set for the summarized route.

126. Which of the following statements about penultimate hop popping are true? (Multiple Choice)

It is used only for directly connected subnets or aggregate routes.

It can only be used with LD

It is only used when two or more labels are stacked.

It enables the Edge LSR to request a label pop operation from its upstream neighbors.

It is requested through LDP using a special label value that is also called the implicit-null value.

127. Which AS_Path can match the ip as-path-filter 1 permit ^12.*74$ command?

AS_PATH (321 12 2374)

AS_PATH (123 621 743 2374)

AS_PATH (125 328 74 23)

AS_PATH (32 1274 23)

128. As well as automatic configuration of stateless addresses, IPv6 devices can also obtain information about addresses, gateways, and DNS through DHCPv6.

TRUE

FALSE

129. Under which circumstances would an RSTP bridge flush its MAC address table? (Multiple Choice)

Upon a port state change

Upon receiving a topology change notification

When transitioning from discarding to forwarding

When transitioning from forwarding to discarding

Only when changing from listening to discarding

130. Which device is the DIS according to the following configuration output?

R4 is the DIS in the network segment in which R4 connects to R3. R4 is not the DIS in the network segment in which R4 connects to R1.

R4 is the DIS in the network segment in which R4 connects to R3 and the network segment in which R4 connects to R1.

The pseudonode number of the DIS can be repeatedly used at the same level of the same device.

The pseudonode number of the DIS indicates the DIS priority.

Page 14 of 28

131. Which of the following PIM protocol packets have unicast addresses as their destination addresses? (Multiple Choice)

Assert

Candidate RP Advertisement

Graft

132. CAR has been configured on router HW1.

What best defines Committed Access Rate (CAR)?

CAR allows metering of traffic for traffic shaping.

CAR is a feature that allows the rate limiting of traffic in either the incoming or outgoing direction.

CAR is part of a set of features to be used in conjunction with queuing to form a hierarchical policy. CAR must always be applied in a parent policy-map, whereas CBWFQ should be applied in a child policy-map.

CAR is a queuing feature.

CAR matches only on UDP port range [16384 - 32767],

133. Which of the following configurations are correct for configuring OSPFv3 route summarization? (Multiple Choice)

[Huawei]ospfv3 1 [Huawei-ospfv3-1]abr-summary fc00:0:0:: 48 cost 400

[Huawei]ospfv3 1 [Huawei-ospfv3-1]asbr-summary fc00:0:0:: 48 cost 20 tag 100

[Huawei]ospfv3 1 [Huawei-ospfv3-1]area 1 [Huawei-ospfv3-l-area-0.0.0.1]asbr-summary fc00:0:0:: 48 cost 20 tag 100

[Huawei]ospfv3 1 [Huawei-ospfv3-1]area 1 [Huawei-ospfv3-1-area-0.0.0.1]abr-summary fc00:0:0:: 48 cost 400

[Huawei]interface gigabitethernet 1/0/0 [Huawei-GigabitEthernet1/0/0]asbr-summary fc00:0:0:: 48 cost 20

[Huawei]interface gigabitethernet 1/0/0 [Huawei-GigabitEthernet1/0/0]abr-summary fc00:0:0:: 48 cost 400

134. Which of following statements are true when a PE connects multiple sites using IS-IS? (Multiple Choice)

Multiple sites can share the same IS-IS process.

Each site can use a VPN-instance independently from others to guarantee security.

IS-IS can enable the authentication function to prevent attacks.

IS-IS can enable the GR feature to improve network stability.

135. The default type of routers in IS-IS is Level-2.

TRUE

FALSE

136. Which statements about BGP route reflection are true? (Multiple Choice)

IBGP peers must be fully connected in the absence of a route reflector (RR). The BGP route reflection mechanism is introduced to lower the requirement.

After learning routes from a non-client, a route reflector (RR) advertises these routes to all clients.

After learning routes from a client, an RR advertises these routes to all other clients and non-clients.

After learning routes from an IBGP peer, an RR advertises these routes to all clients and non-clients.

137. Which of the following statements about priority queuing is true?

PQ and LLQ mechanisms are similar and can replace each other.

By default, WRR or WFQ is enabled on a router instead of P

PQ consumes massive storage and processing capabilities. Therefore, enabling PQ on low-end devices is not recommended.

PQ can only be applied on serial interfaces and not on Ethernet interfaces.

138. A workstation has been connected to a workgroup Ethernet switch using a Category 5e cable. The workstation can connect to the rest of the network through the switch (The switch has full connectivity.), but is performing much slower than expected. Interface statistics on the switch reveal many "runts" are being detected. Software capable of reading the counters on the workstation NIC indicates many FCS and alignment errors are occurring.

What is the most likely cause of these errors?

A bad Network Interface Card on the workstation

A bad cable between the workstation and the switch

A port has erroneously been configured as an 802.lq trunk port

Mismatched speed settings between the workstation and the switch

Mismatched duplex settings between the workstation and the switch

139. To improve delay and jitter on frame relay links, we can fragment and assemble the frame between multiple PVCs. This is similar to what happens with PPP multilink.

TRUE

FALSE

140. As shown in the following figure, what routes can R2 learn?

R2 can learn all the routes of R1.

R2 can learn the route 10.1.1.0/24.

R2 can learn routes 10.1.2.0/24 and 10.1.3.0/24.

R2 can learn the LSPs of R1 but cannot add them to the routing table.

Page 15 of 28

141. You try to perform a traceroute to an Internet destination from your PC, but the traceroute hangs when it reaches the router. There is an inbound access-list applied to the serial interface on the Internet router with a single line: "rule 5 permit tcp source any destination any."

What access-list entry may need to be added to the access-list in order to get traceroute to work?

rule 10 permit udp source any destination any

rule 10 permit icmp source any destination any icmp-type ttl-exceeded rule 15 permit icmp source any destination any icmp-type port-unreachable

rule 10 permit icmp source any destination any icmp-type ttl-exceeded rule 15 permit icmp source any destination any icmp-type echo-reply

rule 10 permit icmp source any destination any icmp-type echo rule 15 permit icmp source any destination any icmp-type net-unreachable

rule 10 permit udp source any destination any rule 15 permit icmp source any destination any icmp-type protocol-unreachable

142. During the process in which IS-IS establishes a neighbor relationship, IS-IS does not send CSNP packets on a P2P network.

TRUE

FALSE

143. As shown in the following figure, the neighbor relationship between R1 and R2 has just been established.

Which of the following statements is true about the database synchronization process between R1 and R2?

The packet sent from R1 to R2 is a PSNP packet.

The packet sent from R1 to R2 is a CSNP packet.

The packet sent from R1 to R2 is an LSP packet.

The packet sent from R1 to R2 is a Hello packet.

144. Huawei wants to deploy a multicast application.

If traffic from the multicast application will only be transmitted on Huawei’s internal network, what multicast address needs to be allocated for the multicast application?

The multicast application can be allocated with a multicast address within the range of 224.0.1.0 to 239.255.255.255.

The multicast application needs to be allocated with a multicast address within the range of 239.0. 0.0 to 239.255.255.255.

The multicast application needs to be allocated with a multicast address within the range of 232.0. 0.0 to 232.255.255.255.

Huawei needs to apply a multicast address assigned by IAN A for the multicast application.

145. IS-IS packet types include SNP, IIH, and ISP packets.

TRUE

FALSE

146. Which layers do the OSI model and the TCP/IP models have in common? (Multiple Choice)

Session

Data link

Transport

Presentation

Physical

Application

147. Which statement is true?

TFTP lies at the Application layer and runs over FT

TFTP lies at the Transport layer and runs over I

TFTP lies at the Application layer and runs over UD

TFTP lies at the Application layer and runs over TC

TFTP lies at the Transport layer and runs over ICM

148. A newly deployed HW router is configured for Weighted Random Early Discard (WRED) on the HW network.

WRED has which of the following characteristics? (Multiple Choice)

For packets of different priorities, WRED can set different packet drop thresholds and packet loss ratios.

When the minimum threshold is crossed, WRED begins dropping all incoming packets (tail-drop).

Global Synchronization is avoided by selectively dropping packets from multiple TCP flows.

Low bandwidth flows are experiencing packet drop at a higher rate than higher bandwidth flows.

149. Which of the following are differences between traffic policing and traffic shaping? (Multiple Choice)

With traffic shaping, a router stores excess traffic in packet buffers until bandwidth is available again.

With policing, you can tune the buffer usage for traffic exceeding the specified CI

With shaping, you can tune the buffer usage for traffic exceeding the specified CI

Shaping should only be applied for ingress traffic and policing only for egress.

Policing uses a token bucket algorithm and shaping uses an SPD algorithm.

150. Why does RSTP converge faster than STP?

RSTP has more Port states.

RSTP has smaller timers.

RSTP has less overhead.

RSTP convergence is based on mechanisms other than the timers.

Page 16 of 28

151. OSPF is running on a network.

In OSPF, what LSA type would only cause a Incremental SPF calculation? (Multiple Choice)

Type 1

Type 2

Type 3

Type 4

Type 5

152. A company has deployed SSM on its network.

To reduce bandwidth consumption of multicast data on the LAN, the network administrator configures the following commands on the S5700 switch:

[Quidway]igmp-snooping enable

[Quidway]vlan 10

[Quidway-vlan10]igmp-snooping enable

[Quidway-vlan10]igmp-snooping version 3

The S5700 switch then forwards data packets based on groups that hosts have joined.

TRUE

FALSE

153. To join a multicast based video session within the HW network, Host HW1 must do which of the following?

Unicast an IGMPv2 membership report to the default router on the local subnet.

Multicast an IGMPv2 membership report on the local subnet with a destination IP Address set to the multicast group being joined.

Unicast an IGMPv2 membership report to the Rendezvous Point for the group.

Multicast an IGMFV2 membership report to the "All-PIM-Routers" multicast group and 224.0.0.2 on the local subnet.

154. You work as a network engineer for a company and want to configure two BGP speakers to form an EBGP session across a firewall. On the engineer's network, the firewall always permits TCP sessions that are initiated from the inside network (the network attached to the inside interface of the firewall).

What is the prerequisite for enabling BGP to run on this network?

EBGP multihop will need to be configured for this to work.

This should work with normal BGP peering, with no additional configuration on the BGP speakers or the firewall.

The BGP protocol port must be opened on the firewall.

There is no way to make BGP work across a firewall.

155. Which of the following are used in Ethernet networks? (Multiple Choice)

Non Canonical format MAC addresses.

CSMA/CD for media access.

Canonical format MAC addresses.

802.5 encapsulated frames.

802.3 encapsulated frames

156. To configure the verification of the source address of IP data packets on switches, which of the following configurations is complete and correct?

[Quidway]interface gigabitethernet 0/0/1 [Quidway-GigabitEthernet0/0/1]ip source check user-bind enable [Quidway-GigabitEthernet0/0/1]quit

[Quidway]dhcp enable [Quidway]dhcp snooping enable [Quidway]vlan 10 [Quidway-vlan10]dhcp snooping enable [Quidway-vlan10Jdhcp snooping trusted interface gigabitethernet 0/0/1 [Quidway-vlan10]ip source check user-bind enable [Quidway-vlan10jquit

[Quidway]dhcp enable [Quidway]dhcp snooping enable [Quidway]arp learning strict [Quidway]ip source check user-bind enable

[Quidway]user-bind static ip-address 10.0.0.1 mac-address 0001-0001-0001 [Quidway]user-bind static ip-address 10.0.0.11 mac-address 0002-0002-0002 [Quidway]vlan 10 [Quidway-vlan10]ip source check user-bind enable

[Quidway]anti-attack abnormal enable [Quidway]arp learning strict [Quidway]vlan 10 [Quidway-vlan10]urpf strict [Quidway-vlan10]quit

157. The LS Sequence Number field is used to detect expired and duplicate LSAs. This field is a signed 32-bit integer and therefore the minimum LS Sequence Number is 0x80000000.

TRUE

FALSE

158. To optimise network resources routers should forward packets and select paths based on user-defined policies. Policy routing can be used to achieve this target.

Which of the following statements is false about policy routing?

Policy based routing cannot be used to set the IP precedence.

Policy based routing cannot set the DSCP in one statement.

Policy based routing can be used to set the next hop IP address.

Policy based routing can be used to match the length of a packet.

159. 802.1s defines deployment for which of the following?

One STP instance for each set of Bridges

One global instance for all VLANs

One STP instance for each VLAN

One STP instance for each set of VLANs

160. Which of the following statements are true about IS-IS external route tags? (Multiple Choice)

The advertised LSP carries an external route tag only when the IS-IS cost type is Wide, Wide-compatible, or Compatible.

The IS-IS external route tag takes effect only for Level-2 routes.

The IS-IS external route tag is enabled by default.

The value of the IS-IS external route tag ranges from 1 to 4294967295.

The IS-IS external route tag can be used to filter routes.

Page 17 of 28

161. Why is BGP an enhanced distance-vector routing protocol?

BGP does not accept the route whose AS_Path attribute contains the local AS number.

The Nexthop attribute is a well-known mandatory attribute of BGP routes.

The AS_Path attribute of a BGP route lists all the ASs that the route passes through. Based on routing selection rules, the route with the shortest AS_Path is preferred.

Based on BGP route selection rules, the route with the lowest MED value is preferred.

162. To allow routers on the two ends of an IPv6 over IPv4 manual tunnel to exchange routing information, you can enable OSPFv3 on the tunnel. Neighbor relationships then can be generated normally and tunnel interfaces can function as P2P link interfaces.

TRUE

FALSE

163. A G) multicast entry is associated with which multicast type of feature within the HW IP multicast network? (Multiple Choice)

Shared tree

PIM bidirectional

Dense Mode

Source tree

Sparse Mode

Dense Tree

164. An AS-path-filter is used to filter as-path attributes of BGP routes. The as-path attribute is actually a character string which can be matched using a regular expression.

TRUE

FALSE

165. Which of the following mechanisms in PIM-SM can be used to prevent duplicate traffic on a shared network segment?

BSR/RP mechanism

Assert mechanism

Join/Prune mechanism

166. Which of the following tools cannot be directly referenced by if-match clauses in a route-policy?

Regular expression

IP-prefix

AS-path-filter

Community-filter

167. A company's network link quality is poor, and frequent link faults cause route flapping and even routing loops. The administrator decides to deploy uRPF on the entire network this will solve the problem and improve network stability.

TRUE

FALSE

168. Which of the following AS paths match this AS-path-filter?

ip as-path-filter 1 permit .*(1001400)$

(Multiple Choice)

100

3100

1234 1400

300 4200

169. You have two routers running BGP to two different ISPs. You want to influence the way that traffic comes into your network from the Internet, but your company policy prohibits the use of BGP communities.

What is the best way to influence this traffic?

Adjust the cost of your routers.

Use MED values.

Increase the weight value on one of your routers.

Decrease the local preference value on one of your routers.

Apply AS-path additive.

Use Metrics.

170. Which of following statements is true about the domain-authentication-mode md5 hello command in the IS-IS process?

Authentication information is carried in ISIS HELLO packets.

Authentication information is carried in all SNP and LSP packets.

Authentication information is carried in all ISIS packet.

Page 18 of 28

171. Which devices are used in the MPLS BGP VPN domain? (Multiple Choice)

CPE

User router

172. IP multicast addresses in the 224.0.0.0 through 224.0.0.255 range are reserved for what purpose?

For Administratively Scoped multicast traffic intended to remain inside a private network

For Administratively Scoped multicast traffic that is not supposed to be transmitted on the Internet

For link-local multicast traffic consisting of network control messages that are not supposed to leave the local subnet

For any valid multicast data stream used by multicast applications

For global Internet multicast traffic intended to travel throughout the Internet

173. The following figure shows the topology of a multi-protocol network. Router R4 in Area 1 imports routes learned through BGP to the OSPF processes.

What types of LSAs will R3 generate and advertise to Area 0? (Multiple Choice)

Type 4 - ASBR Summary LSAs

Type 5 - AS External LSAs

Type 1 - Router LSAs

Type 7 - NSSA AS-external-LSAs

Type 2 - Network LSAs

174. A VPN instance is a VPN routing and forwarding (VRF) table. A PE maintains multiple routing and forwarding tables, including a public routing and forwarding table, and one or more VRFs as well as VPNv4 routing and forwarding tables.

TRUE

FALSE

175. WRED can avoid congestion.

WRED is preferred in which of the following scenarios?

Most traffic on the network is UDP traffic.

Most traffic on the network is TCP traffic.

Deploy WRED on low-bandwidth links.

Deploy WRED on serial links.

The WRED mechanism discards packets randomly. The effectiveness is irrelevant to scenarios.

176. In a bridged LAN, the number of BPDUs with the TCA bit set is incrementing rapidly.

What could be the cause of this? (Multiple Choice)

BPDUs with the TCA bit set are part of normal operation with a bridged LA

Improper cabling is being used in the network.

There is no spanning tree edge port configured on the ports connecting two workstations.

The root switch is experiencing problems due to high CPU utilization and is not sending any BPDUs.

177. You want to allow only telnet traffic to a server with the IP address 10.1.1.100.

You add the following access list on the router:

rule 5 permit tcp source any destination 10.1.1.100 0.0.0.0 destination-port eq 23

rule 10 deny ip source any destination any

You then apply this access list to the inbound direction of the serial interface.

What types of packets will be permitted through the router after this change? (Multiple Choice)

A non-fragment packet to the server on port 21

A non-initial fragment packet to the server on port 23

A non-initial fragment packet passing through to another host that is not 10.1.1.100

A non-initial fragment packet going to the server on port 21

An initial-fragment or non-fragment packet to the server on port 23

178. Which of the following statements are true about Smart-Link? (Multiple Choice)

Smart-Link and STP run on the same switch port will make network converge faster.

Smart-Link supports load balancing.

A Smart-Link group contains two types of interfaces: master interface and slave interface.

Smart-Link running on one switch without any communication between switches.

179. Which of the following statements is true about IPv6 multicast when compared with IPv4 multicast?

The load balancing function of IPv6 multicast extends multicast routing rules, which does not depend on the RPF check.

IPv6 multicast clients are added to multicast groups using IGMFV3.

MSDP and dense mode multicast is not part of IPv6 multicast.

The first 8 bits of IPv6 Multicast address are always FF (11111111).

180. What characteristics apply to Syslog messages? (Multiple Choice)

Its transmission is reliable,

Its transmission is secure,

Its transmission is acknowledged,

Its transmission is not reliable,

Its transmission is not acknowledged.

Its transmission is not secure.

Page 19 of 28

181. Before configuring AAA, you need to define the RADIUS server.

The following commands can be used to define it.

[Huawei]radius-server template EXAM

[Huawei-radius-EXAM]radius-server shared-key cipher Huawei 123

[Huawei-radius-EXAM]radius-server authentication 10.7.66.66 1812

[Huawei-radius-EXAM]radius-server authorization 10.7.66.66 1812

[Huawei-radius-EXAM]radius-server accounting 10.7.66.66 1813

[Huawei-radius-EXAM]radius-server retransmit 2

TRUE

FALSE

182. When a router within the HW network makes a forwarding decision, the_________________________is always used to select the best route from those installed in the routing table.

Administrative Distance

Router ID

Longest prefix match

Routing process ID

Peer ID

183. On a PIM-SM network, how does a router select the upstream interface?

Looks up the outbound interface that matches the mapping proxy in the unicast routing table.

Selects the interface that directly connects to multicast group members.

Looks up the outbound interface that matches the RP address in the unicast routing table.

Selects the interface that receives PIM Join messages.

Selects the interface that sends REM Hello messages.

184. Which of the following are key differences between RIP version 1 and RIP version 2? (Multiple Choice)

RIP version 1 supports authentication while RIP version 2 does not.

RIP version 2 uses multicasts while RIP version 1 does not.

RIP version 1 uses hop counts as the metric while RIP version 2 uses bandwidth information.

RIP version 1 does not support VLSM while RIP version 2 does.

RIP version 1 is distance vector while RIP version 2 is not.

185. You must configure a router for Policy Based Routing (PBR).

PBR allows network administrators to implement routing policies to allow or deny paths based on which of the following? (Multiple Choice)

Size of packets

Identification of a particular end system

Protocol

Application

Throughput

186. Which of the following are found in a basic Network Layer Packet? (Multiple Choice)

Data Link Layer Header

Upper Layer Data

Network Layer Header

Path records

Network Layer Trailer

187. Which of the followings can only be used for BGP route selection? (Multiple Choice)

ACL

IP-PREFIX

AS-PATH-FILTER

COMMUNUY-RLTER

188. Multicast is enabled for AS 100 and AS200. Each AS has its own BSRs and RPs. RPs exchange SA messages using MSDP. To prevent BSR messages from traversing the AS boundary, the simplest method is to configure ACL on AS interconnection interfaces to filter BSR messages.

TRUE

FALSE

189. Which of the following statements about DSCP is true?

The IP precedence and DSCP have no overlapping fields.

The DSCP contains class selectors for backward compatibility with the IP precedence.

The DSCP is exactly the same as IP precedence; the name change is merely a marketing convention.

The last 2 bits of the DSCP overlap with the IP precedence.

DSCP is only for TCP; IP precedence is for UD

190. Source Specific Multicast (SSM) is being used throughout the HW IP Multicast network.

Which of the following three statements about SSM are true? (Multiple Choice)

There are no RPs to worry about.

SSM uses shared Trees only.

SSM uses Shortest-Path Trees Only.

SSM is best suited for applications that are of the one-to-many category.

The use of SSM is recommended when there are many sources and it is desirable to keep the amount of mroute state in the routers in the network to a minimum.

SSM is best suited for applications that are of the Many-to-Many category.

Page 20 of 28

191. Which of the following statements is true about the GVRP interface registration modes on Huawei switches?

A GVRP interface supports four registration modes.

When in normal mode, a VLAN can be dynamically registered and deregistered on the GVRP interface. Deregistration includes the deletion of VLANs that are dynamically learned and created on the local device.

When in forbidden mode, the GVRP interface must work in hybrid mode.

When in fixed mode, the interface cannot register dynamic VLANs.

192. Which of the following statements is true about Eth-Trunk on Huawei devices?

Eth-Trunk can be used only for Layer 2 interfaces.

Eth-Trunk can be used for Layer 2 and Layer 3 interfaces.

Link members of an Eth-Trunk cannot be deployed across devices.

Eth-Trunk can implement load balance based on TCP or UDP port.

193. 玫

194. The configurations of the defined route-policy test are as follows:

ip community-filter 1 permit 100:1

ip as-path-filter 2 permit ^100$

route-policy test permit node 10

if-match community-filter 1

if-match AS-path-filter 2

apply as-path 200

Which of the following statements is true?

The BGP routes will match the route-policy test only when they contain either community attribute 100:1 or as-path 100. The as-path of the matched routes is then changed to 200.

The BGP routes will match the route-policy test only when they contain both community attribute 100:1 and as-path 100. The as-path of the matched routes is then changed to 200.

The BGP routes will match the route-policy test only when they contain as-path 100. The as-path of the matched routes is then changed to 200.

The BGP routes will match the route-policy test as long as they contain community attribute 100:1. The as-path of the matched routes is then changed to 200.

195. The HW network administrator plans to migrate their IP multicast network from IGMP version 2 to IGMP version 3.

IGMFV3 has which of the following major functionality changes compared with IGMPv2? (Multiple Choice)

IGMPv3 added the ability for a host to specify which sources in a multicast group it does not wish to receive.

IGMFV3 added the ability for a host to specify which sources in a multicast group it wishes to receive.

IGMPv3 added "Request-to-send" and "Clear-to-send" Signaling between sources and the local IGMP querier.

IGMPv3 removed the "report-suppression" feature for IGMP Membership Reports.

IGMFV3 removed the ability for a wildcard join of all sources in a multicast group.

196. Which of the following statements is true about the MUX VLAN feature of Huawei switches?

The MUX VLAN and the Super VLAN features can be used together on the same VLA

The Principal Port can communicate with all ports in the MUX VLA

The Mux VLAN is classified into Principal VLAN and Subordinate VLA

The Subordinate VLAN is classified into Separate VLAN and Isolate VLA

Each Separate VLAN can be bound to multiple Principal VLANs.

197. If RIPng authentication is configured, the password for authentication will be in the first message in the route update packet.

TRUE

FALSE

198. Router HW1 is an MPLS LSR router in the HW service provider network. A labeled packet is received by this router for which there is not a label entry present in the LRB.

The router performs which of the following actions?

It uses a default label for forwarding.

It strips the label and does a lookup in the RB using the IP destination address.

It drops the packet.

It uses LDP to create an LSP and a new entry in the LRB for that label.

199. The ip as-path-filter as-path-filter-number {deny | permit} regular-expression command is used to configure an AS-path-filter. In this command, several clauses can be configured for one as-path-filter-number.

What is the relationship between these clauses?

AND relationship

OR relationship

Routes are matched in order. Once a route is matched successfully, the matching process is terminated.

A route is matched in order. The route is considered matched only when the route matches all clauses.

200. What are the functions of the route target on an MPLS VPN network? (Multiple Choice)

Enable the peer PE to determine which VPNv4 routes can be imported to the specified VR

Enable the peer PE to determine which VPNv4 routes cannot be imported to the specified VRF_

Enable the peer CE to determine which VPNv4 routes can be imported to the specified VR

Enable the peer CE to determine which VPNv4 routes cannot be imported to the specified VR

Page 21 of 28

201. With regard to TCP headers, which control bit tells the receiver to reset the TCP connection?

SND

ACK

CLR

RST

PSH

SYN

202. Route selection tools may have several items defined.

To which of the following tools will the system automatically add a deny-any item following all the configured items? (Multiple Choice)

IP-prefix

AS-path-filter

Community-filter

Route-policy

203. When comparing link state and distance vector routing protocols, what set of characteristics best describes link state routing protocols?

Fast convergence and lower CPU utilization

High CPU utilization and prone to routing loops

Slower convergence time and high CPU utilization

Fast convergence and greater CPU utilization

204. During IS-IS area authentication, which kind of IS-IS packet will carry authentication information?

Level-1 IS-IS SNP and LSP packets

Level-2 IS-IS SNP and LSP packets

Level-1 IS-IS Hello packets

Level-2 IS-IS Hello packets

205. Which of the following DNS resource records are valid? (Multiple Choice)

PTR

FQDN

206. In traffic policing using two token buckets & two-rate, the number of tokens in bucket C is TC and the number of tokens in bucket P is TP.

When a packet with a length of B enters, which of the following statements are true? (Multiple Choice)

If TP - B >0 and TC - B >0, the packet is marked green.

If TP - B >0 and TC - B <0, the packet is marked yellow.

If TP - B <0 and TC - B <0, the packet is marked red.

If TP - B >0 and TC - B <0, the packet is marked green.

207. As shown in the following figure, the IS-IS overload bit is set in the configuration of R3.

Which of following statements are true? (Multiple Choice)

R3 starts the overload status. R1 and R2 will not calculate the LSP generated by R3 in the SPF tree.

The LSP generated by R3 will not be flooded to R1 and R2.

Direct routes of R3 will be neglected by R1 and R2 because of the IS-IS overload bit.

Routes imported by R3 using the import-route command cannot be advertised.

When a router is experiencing a memory shortage, the system automatically sets the overload bit in the sent LSP whether or not you have run the set-overload command.

208. RIPng advertises information about a summarized route in which the prefix is FC00:200:: and the prefix length is 32 bits.

Which of the following configurations is correct?

[Huawei]interface gigabitethernet 1/0/0 [Huawei-GigabitEthernet1/0/0]ripng summary-address fc00:200:: 32

[Huawei]ripng 100 [Huawei-ripng-100]ripng summary-address fc00:200:: 32

[Huawei]interface gigabitethernet 1/0/0 [Huawei-GigabitEthernet1/0/0]ripng summary-address fc00:200::/32 output

[Huawei]ripng 100 [Huawei-ripng-100]ripng summary-address fc00:200::/32 interface GigabitEthernet1/0/0

209. From the list of applications below, identify the TCP port numbers used for 443,179, 137, 110, and 23 in the proper sequence:

BGP, POP3, SNMP, TFTP, Telnet

LDAP, SNMP, TFTP, POP3, Telnet

HTTPS, SNMP, POP3, DNS, Telnet

Finger, DHCP Server, NetBios Name Server, POP3, Telnet

HTTPS/BGP, NetBios Name Server, POP3, Telnet

210. On an IS-IS broadcast network, a router with priority 0 does not participate in the DIS election during neighbor relationship establishment.

TRUE

FALSE

Page 22 of 28

211. Two routers configured to run BGP have been connected to a firewall, one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer, including the correct BGP session endpoint addresses and the correct BGP session hop-count limit (EBGP multihop).

What is a good first test to see if BGP will work across the firewall?

Attempt to Telnet from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works, BGP will work, since telnet and BGP both use TCP to transport data.

Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them, BGP should work, since BGP uses IP to transport packets.

There is no way to make BGP work across a firewall without special configuration, so there is no simple test that will show you if BGP will work, other than trying to start the peering session.

There is no way to make BGP work across a firewall.

212. Which statements regarding IBGP or EBGP neighbors are true? (Multiple Choice)

BGP updates from an IBGP peer are propagated to other IBGP and EBGP peers.

BGP updates from an EBGP peer are propagated to other IBGP and EBGP peers.

IBGP peers must be directly connected; otherwise, the IBGP-multihop option must be configured.

EBGP peers must be directly connected; otherwise, the EBGP-multihop option must be configured.

IBGP neighbor peering can be established using the loopback interface address.

EBGP neighbor peering must use the physical interface address to establish peering.

213. What methods can Huawei switches use to assign VLANs? (Multiple Choice)

Port-based VLAN assignment

IP subnet-based VLAN assignment

Protocol-based VLAN assignment

MAC address-based VLAN assignment

QoS-based VLAN assignment

214. Which commands are relevant to a BGP route reflector? (Multiple Choice)

peer reflect-client

reflect between-clients

reflector cluster-id

group 1 internal

215. On router HW1, the VRP command "bandwidth-reference 5000" was configured.

What will be the OSPF metric for a GigabitEthernet interface on router HW1?

500

5000

50000

216. What IPv6 address would you ping to determine if OSPFv3 is able to send and receive unicast packets across a link?

Link Local Address

Site local Multicast

Unique Local Address

Anycast Address

Global Address of the link

217. On an MPLS VPN network, different CEs can use different routing protocols to exchange routing information with the same PE. These routing protocols are independent from one another.

TRUE

FALSE

218. As shown in the following figure, which of the following ensures that the two routers can establish an IS-IS neighbor relationship?

The type of the two routers can keep the default settings.

The type of the two routers must be Level-1.

The IS-IS process IDs of the two routers must be the same as each other.

The type of one router can be Level-1-2, and that of the other can be Level-1.

219. Which of the following statements are true about RIPng? (Multiple Choice)

Each RIPng update packet contains a maximum of 25 routes.

RIPng supports a maximum of 32 hops.

RIPng does not have an authentication mechanism.

RIPng supports MD5 authentication.

RIPng uses the link local address to send update packets.

220. In Rapid Spanning Tree Protocol (RSTP), which port provides a backup path to the root bridge and which state should this port be in?

Root port/listening

Alternate port/forwarding

Alternate port/learning

Designated port/learning

Alternate port/discarding

Page 23 of 28

221. There are 6 bits in the 802.1Q VLAN tag used to indicate the priority.

TRUE

FALSE

222. HW users transfer a large number of files using TFTP.

Upon which of the following does this protocol rely?

ICMP and UDP

IP and TCP

NFS

FTP

UDP

223. Which Multicast Protocols use Reverse Path Forwarding (RPF) information when sending multicast traffic streams towards receivers within HW routers? (Multiple Choice)

DVMRP

PIM Sparse Mode

PIM Dense Mode

Multicast OSPF

224. Which of the following statements are NOT true regarding the TCP sliding window protocol? (Multiple Choice)

The initial window offer is advertised by the sender.

The sender need not transmit a full window's worth of data.

It allows the transmission of multiple frames before waiting for an acknowledgement.

If the retransmission timer expires without the sender receiving an ACK message, the receiver retransmits the packet to the sender.

The receiver is required to acknowledge the data packets transmitted by the sender.

The size of the sliding window can only increase or stay the same.

225. Which of following statements is true about IS-IS GR?

IS-IS GR is enabled by default.

IS-IS GR has four timers.

IS-IS GR notifies events and maintains the neighbor relationship through CSNP packets.

IS-IS GR defines a new TLV architecture to support this feature.

226. The network manager can use the committed access rate (CAR) for traffic policing.

Which of the following technologies are available for CAR traffic policing? (Multiple Choice)

One token bucket & one-rate

Two token buckets& & one-rate

Two token buckets & two-rate

Three token buckets& & one-rate

227. Which of the following statements regarding Transparent Bridge tables are FALSE? (Multiple Choice)

Decreasing the bridge table aging time would reduce flooding.

Increasing the bridge table aging time would reduce flooding.

Bridge table entries are learned by examining the source MAC address of each frame.

Bridge table entries are learned by examining destination MAC addresses of each frame.

228. When receives or transmits data frames on an access port, what will the switch do?

Switch only receives untagged frames from access port and drop all tagged frames.

Switch will send tagged frames belong to a specified vlan.

When received a tagged frame from an access port. Switch may forward it vlan.

Switch will learn the MAC-address only on access port.

229. The following figure shows the correct processes of resolving the link-layer address using NDP?

TRUE

FALSE

230. MPLS BGP VPN is an L3VPN technology used in a Provider Provisioned VPN (PPVPN) solution.

What is the basis for MPLS BGP VPN?

CE and P

PE, P and CE

P and PE

Page 24 of 28

231. To implement RP redundancy, a company has deployed Anycast on its network.

When RPs use MSDP to synchronize SA information, the administrator needs to configure the following commands:

[Huawei]interface LoopBack0

[Huawei-LoopBack0]ip address 12.12.12.12 255.255.255.255

[Huawei-LoopBack0]pim sm

[Huawei-LoopBack0]quit

[Huawei]interface LoopBack1

[Huawei-LoopBack1]ip address 1.1.1.1 255.255.255.255

[Huawei-LoopBack1]pim sm

[Huawei-LoopBack1]quit

[Huawei]pim

[Huawei-pim]c-rp LoopBack0

[Huawei-pim]quit

[Huawei]msdp

[Huawei-msdp]originating-rp LoopBack1

[Huawei-msdp]peer 2.2.2.2 connect-interface LoopBack1

TRUE

FALSE

232. Which of following statements is true about IS-IS LDP synchronization?

LDP establishes a neighbor relationship faster than IS-IS, so LDP synchronization is disabled by default.

LDP synchronization can prevent traffic loss during an active/standby link switchover.

LDP synchronization can be enabled globally.

LDP synchronization can be configured on Loopback interfaces.

233. A network device CPU is attacked by malicious traffic.

Which of the following methods can prevent such attacks? (Multiple Choice)

Restrict the rate of packets sent to the CP

Use ACL to filter data packets on the attacked router port.

Analyze packets sent to the CPU and find the user or interface that initiates the attack.

Use CPCAR settings to limit the rate of packets sent to the CPU, based on the protocol type.

Disable the remote login function of the router.

234. Which of the following statements accurately describe a link state routing protocol? (Multiple Choice)

The router sends all link state information received from one neighbor to all the other neighbors, ensuring database synchronization.

Routers in the flooding domain may repeatedly receive the same link state information.

Each router individually builds a picture of the entire flooding domain.

Routers in the entire flooding domain have the same link state database.

Each router directly learns routes from the update messages and adds these routes to the routing table.

235. In order to maximize the speed and duplex settings of auto-negotiation, a network administrator has configured all Ethernet ports of a workgroup switch to 100 Mbps, full-duplex. When a workstation NIC configured for auto-negotiation is connected to the switch, the resulting negotiated parameters are 100 Mbps, half-duplex.

What statement best accounts for this result?

The workstation NIC may not be properly configured for auto-negotiation as the highest port speed and duplex should result from this setup.

The port speed is auto-negotiated by the burst of Fast Link Pulses sent upon port initialization, but duplex negotiation does not use FLF^.

The switch port should be configured as an edge port since the spanning tree protocol leaves the port in the blocking state as it initializes, causing the auto-negotiation process to fail.

Without auto-negotiation on the switch, FLPs will not be sent to the workstation, and as a result, the workstation will configure itself to half-duplex.

There is a problem with the NIC, most likely resulting from older drivers since auto-negotiation will allow the workstation NIC to identify what speed and duplex settings have been configured on the switch.

236. Which features can improve the reliability of routers? (Multiple Choice)

Double engines

Double power supplies

Hot-swappable modules

ISSU

237. Which of the following are functions of Random Early Discard (RED)? (Multiple Choice)

Avoiding global synchronization for TCP traffic

Performs rate limiting on the specified data traffic

Minimizing packet delay jitter

Ensuring that high priority traffic gets sent first

Preventing starvation in lower priority queues

238. Besides an IPv4 address, a router distinguisher (RD) also contains an identifier that distinguishes IP routes to the same destination IP address in different VPNs.

How many bits are there in the identifier?

128

239. You must configure a router to policy route specific traffic across an interface.

What are the two best types of information that can be used to direct traffic along this route when using policy based routing?

The packet time to live (TTL) and the source IP Address

The Source IP address and the layer 2 source address

The source IP Address and the protocol (such as FTP, HTTP, and others)

Type of service header and packet length

240. Which of the following configurations can be performed to implement fast failure detection on a network? (Multiple Choice)

Reduce the hold time of Join/Prune messages.

Reduce the interval for an interface to send Hello messages.

Set up a PIM BFD session between network segment neighbors.

Reduce the interval for sending Join/Prune messages.

Page 25 of 28

241. On an MPLS VPN network, which interface is used by PEs to set up an MP-IBGP peer relationship?

PE interface connected to a P router

PE interface connected to a CE

Loopback interface

Any interface can be used

242. A router is configured for OSPF and is connected to two areas: area 0 and area 1. You configure area 1 as a stub area.

Which LSA types will exist inside area 1?

Type 7

Type 1 and 2

Type 1, 2, and 5

Type 3 and 4

Type 1, 2, and 3

243. NAC is an end-to-end security solution. To protect the security of the entire network, it combines terminal security with network admission control.

TRUE

FALSE

244. On a Huawei switch hybrid port, VLAN1 can be configured as an untagged VLAN.

TRUE

FALSE

245. To display the routing table of router R1, the "display ip routing-table" command was issued. Router R1 is running OSPF.

Which one of the following statements is true regarding the OSPF information in a routing table?

A routing designated with only an “O_ASE" represents either a type-1 or type-2 LS

A route that has been imported into OSPF can only be represented with an “O_ASE” designation.

Routes that are within an area (intra-area) are marked with an “O_IA” in the routing table.

Type-7 LSAs display routes are imported into OSPF from another process, and are indicated by an "OSPF" marking.

All LSA types have unique designations in the IP routing table.

246. As shown in the following figure, what are the reasons why the two routers cannot establish an IS-IS neighbor relationship? (Multiple Choice)

The IS-IS process IDs of the two routers are different from each other.

The system IDs of the two routers conflict with each other.

The IS-IS cost types of the two routers are different to each other.

The IS-IS preference values of the two routers are different to each other.

The interfaces of the two routers are on different network segments.

247. Which of the following character strings matches the regular expression ^100$?

3100

100

1008

100 200

248. On a switch running the rapid spanning tree protocol, which port will send a BPDU with the proposal flag set?

Designated port in forwarding state

Designated port in non-forwarding state

Root port in blocking state

Alternate port

249. Which tool can be used to select BGP route based on the path that the route has followed?

ACL

IP-prefix

AS-path-filter

Community-filter

250. In the HW IP multicast network where many sources are also receivers, what protocol is used to allow the use of the same shared tree for traffic from sources towards RP and from RP towards receivers?

PIM Dense Mode (PIM DM)

Multicast Open Shortest Path First (MOSPF)

Distance Vector Multicast Routing Protocol (DVMRP)

Bidirectional PIM

PIM Sparse Mode (PIM SM)

Page 26 of 28

251. When DLDP detects a unidirectional link on an interface, the default operations on Huawei devices include: DLDP switches to the interface to Disable state, generates a trap and sets the interface state to DLDP Down.

TRUE

FALSE

252. Routers HW1 and HW2 are in the same LAN and both are running OSPF.

Which multicast IP address will HW1 and HW2 use to send updates to each other? (Multiple Choice)

224.0. 0.10

224.0. 0.1

224.0. 0.13

224.0. 0.5

224.0. 0.9

224.0.0.6

253. Which of the following statements about the BSR/RP mechanism are true? (Multiple Choice)

A PIM-SM domain can have multiple C-BSRs, but only one elected BS

An elected BSR can collect C-RP information by using the C-RP packets received.

An elected BSR floods Bootstrap packets to advertise BSR information and C-RP information to all routers in a PIM-SM domain.

A C-BSR can also collect C-RP information by using C-RP packets.

254. Authentication can be configured in the IS-IS protocol to enhance IS-IS security. The IS-IS authentication functions include interface authentication, area authentication, and routing domain authentication.

TRUE

FALSE

255. Which of the following statements are false about Weighted Round Robin (WRR)? (Multiple Choice)

WRR is a congestion management technology.

WRR ensures that all queues being serviced.

WRR ensures important traffic being forwarded first.

WRR prevents congestion on the network.

WRR cannot be used on gigabit-ethernet interfaces.

256. A switch is running the Rapid Spanning Tree Protocol (RSTP).

Upon a topology change, what happens to dynamic entries in the L2 forwarding table?

Only entries behind the port where TC was received are removed.

All entries are removed except for those behind edge ports and the port where TC was received.

All entries are removed (purged).

All entries are removed except for entries behind edge ports.

The aging timer is set to 15 seconds, so idle entries age out.

257. Routers work at Layer 3 and use uRPF to verify the source IP address of data packets. Switches work at Layer 2 but can also verify the source IP address of data packets if uRPF is enabled.

TRUE

FALSE

258. If a Gigabit Ethernet port receive buffer becomes full on a LAN switch, what protocol can be used to request that the remote port delay sending frames for a specified time?

802.1U

802.3Z

802.1D

802.3

802.3AF

259. What is the function of the peer ignore command?

Deletes a BGP peer

Retains all configurations of the peer and maintains the BGP peer relationship with the peer, but does not receive the routes sent from the peer

Retains all configurations of the peer and maintains the BGP peer relationship with the peer, but does not advertise routes to the peer

Retains all configurations of the peer, interrupts the BGP peer relationship with the peer, and cleans all related routing information

260. As shown in the following figure, which of the following ensures that the two routers can establish

an IS-IS neighbor relationship?

The type of the two routers can keep the default settings.

The type of the two routers must be Level-1.

The IS-IS process IDs of the two routers must be the same as each other.

The type of one router can be Level-1-2, and that of the other can be Level-1.

Page 27 of 28

261. When configuring AAA authentication on Huawei VRP, you can differentiate users based on domains. A domain name can be carried in an access user name to specify an authentication domain.

TRUE

FALSE

262. Which IPv6 header field has a function similar to that of the "Type of Service" field in an IPv4 header?

Flow Label

Version

Next Header

Traffic Class

263. The HW network consists of Network A and B that are connected via Router HW1 and Router HW2. The HW network is shown in the following exhibit.

To set up an IPSec VPN between routers HW1 and HW2, which of the following crypto access-lists must be configured on Router HW1 in order to send LAN to LAN traffic across the encrypted VPN tunnel?

rule permit ip source 192.168.1.1 0 destination 192.168.1.2 0

rule permit ip source 10.1.1.0 0.0.0.255 destination 192.168.1.2 0

rule permit ip source 10.1.1.0 0.0.0.255 destination 10.1.2.0 0.0.0.255

rule permit ip source 192.168.1.1 0 destination 10.1.2.0 0.0.0.255

rule permit ip source 10.1.2.0 0.0.0.255 destination 10.1.1.0 0.0.0.255

264. Which of the following statements is true about RP?

RP is required in PIM multicast models.

RP is a rendezvous point that forwards ail multicast traffic on the entire network.

RP records all multicast sources on a network.

In PIM-SM or PIM-SSM mode, an RP must be configured.

A rendezvous point tree is initiated by an R

265. Which of the following statement about the security association SA in IPsec is wrong?

The SA is uniquely identified by a triplet that includes the Security Parameter Index (SP), the source IP address, and the security protocol number used (AH or ESP).

Use display IPsec to view information about encryption algorithms, traffic, and other information used between another IPsec peer.

IPsec only supports the use of symmetric encryption algorithms to encrypt data.

There must be a two-way SA between IPsec peers to establish an IPsec VPN connection.

266. Which of the following description about the assertion mechanism is correct?

The size of the IP address will not be used as a condition for election during the election of the winner.

In the assertion mechanism, the winner is responsible for forwarding multicast data to the broadcast network segment.

The assertion mechanism is used for the election of the D

In the assertion mechanism, loser shut down the interface connected to the broadcast network.

267. Which of the following statements about the BSR mechanism are true? (Multiple Choice)

A PIM-SM domain can have multiple C-BSRs, but only one elected BS

An elected BSR can collect C-RP information by using the C-RP packets received.

An elected BSR floods Bootstrap packets to advertise BSR information and C-RP information to all routers in a PIM-SM domain.

A C-BSR can also collect C-RP information by using C-RP packets.

268. Regarding the processing mode of MPLS for TTL, which of the following description is correct?

In the Pipe mode, when an IP packet passes through the MPLS network, the IP TTL is decremented by 1 to the MPLS TTL field in the ingress node.

The TTL of the MPLS label has the same meaning as the TTL in the IP header, which can prevent the MPLS network from generating a routing loop (according to the reason A)

Uniform simulation, when the IP packet passes through the MPLS network, the IP TTL of the ingress node is decremented by 1, and the MPLS TTL field is a fixed value.

In MPLS VPN, if you want to hide the structure of the MPLS backbone network, you can use the uniform mode in Ingress for private network packets.

269. Which of the following technologies use tunneling technology to communicate between IPv6 addresses?

Dual Stack

6to4

ISATAP

NAT64

270. BGP 4+ is running between the two routers. The neighbor relationship is normal. However, the BGP routing table of the local router does not have any neighbor routing entries. Which of the following is the possible reason?

The routing entries of the peer BGP routing table are non-optimal.

The next hop address of the BGP routing entry is unreachable.

Peer ignore configured on the peer

The peer is configured with Active-route-advertise

Page 28 of 28

271. Which of the following information can be included in a basic network layer packet? (Multiple choice)

Data link layer header

Upper layer data

Network layer header

Path record

Network layer tail

272. Which of the following description about configuring BGP4+ is correct? (Multiple choice)

The BGP4+ router-ID is the same as the BGP4 router-I

BGP4+ must use the Link-Local address when specifying the peer

The next hop of the BGP4+ route does not use the Link-Local address.

When BGP4+ configures a reflector, the roles of the reflector and the client must be consistent with the configuration of BGP4.

BGP4+ does not support route reflectors.

273. Regarding the stub area in the OSPF protocol, which of the following statement is correct? (Multiple Choice)

ASBR cannot exist in the stub area.

The virtual link cannot traverse the stub area.

stub area is not allowed to inject type7 LSA

The backbone area cannot be configured as a stub area.

274. An engineer performs an import operation on an OSPF router in a company network. Which of the following statement about the introduction of a route LSA is correct? (Multiple choice)

The Advertising Route is set to the router-id of the ASB

netmask is set to 0

link state id is set to the destination network segment address

Use link state id and advertising Router to uniquely identify an LSA

H12-261-ENU Huawei Free Practice Test

Author