Huawei H12-821_V1.0-ENU Online Questions are Valid

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1. Which of the following attribute must be carried in an Update message?

Local-pref

Prefval

MED

AS-Path

2. Compared with STP, RSTP defines the different port states .

Which of the following statements regarding discarding and learning states are true?

The port In discarding or learning state does not forward data frames.

The port in discarding state does not learn MAC addresses table.

The port in discarding or learning state does not learn MAC addresses

The port In learning stole docs not learn MAC addresses table.

3. DRAG DROP

Drag the following VRRP states to the corresponding working mechanisms.

4. After which of the following parameters are modified does an IS-IS neighbor relationship need to re-established?

The cost of an IS-IS interface is changed.

The IP address of an ISIS interface is changed.

The level of an ISIS interface is changed.

The interval at which an IS-IS interface sends IIH packets is changed.

5. In BGP, the origin attribute of the routes imported using the import-route command is incomplete.

TRUE

FALSE

6. Which of the following statements is false, based on the following IGMP information on an interface of RTA?

The interval for sending group-specific Query messages is 60s.

The maximum time for response to Query messages is 10s.

The IP address of the interface is 192.168.1.1.

The IGMP version is IGMPV2.

7. In a route-policy, which of the following BGP attributes can be used in apply clauses?

MED

AS_Path

Tag

Local-Preference

8. If a router ID is configured in both the system via and the BGP view, BGP uses the router ID configured in the BGP view because the BGP view takes precedence over the system view.

TRUE

FALSE

9. Which of the following statements regarding the summary automatic command and BGP route summarization is false?

After this command is configured, BGP sends only the summarized routes to peers

This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization

This command enables automatic summarization for the locally imported routes

After this command is configured, BGP summarizes routes based on natural network segments

10. Which of the following statements about WLAN roaming are true?

APs for roaming do not need to have overlapping signal coverage.

APs for roaming must be in the same extended service set (ESS).

APs for roaming must have overlapping signal coverage.

APs for roaming must be in the same basic service set (BSS).

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11. A local router runs IS-IS and its command output is shown in the following figure .

Which of the following statements is true?

The circuit level of S4/0/0 is Level-1.

S4/0/0 supports IPv6.

S4/0/0 sends IIH packets at the interval of 30s.

The cost of S4/0/0 is 20.

12. RSTP provides different functions in different scenarios .

Which of the following statements Is false?

After TC-BPDU attack defense function is enabled, you can set the number of times the switch processes TC BPDUs within a certain period

The role of the designated port that is enabled with root protection cannot be changed

If the edge port on the switch enabled with BPDU protection receives RST BPDU, the switch sets the edge port as a non-edge-port and triggers STP calculation

When the designated port enabled with root protection receives optimal RST BPDUs, the port enters the Discarding state and does not forward packets. If the port does not receive optimal RST BPDUs within a certain period of time, the port will automatically restore to the Forwarding state

13. According to BGP route selection rules, the route with the higher Local_Pref is preferred.

TRUE

FALSE

14. Which of the following statements is false?

If the current DR fails, the current BDR automatically becomes a new DR, and a BDR will be elected again.

A device with a higher router priority has a higher election priority.

When a router with the highest router priority joins an OSPF network, this router will become the new D

If two devices have the same router priority, the device with a larger router ID has a higher election priority.

15. Which of the following TLVs is used by ISIS to describe the IP address of an interface?

129

131

128

132

16. When a routing policy is used to filter routes, which of the following route prefixes will be denied by the IP prefix below?

1.1.1.1/26

1.1.1.2/16

1.1.1.1/32

1.1.1.1/24

17. BFD control packets are encapsulated in UDP packets for transmission .

What is the destination port number of multi-hop BFD control packets?

4784

3784

5784

2784

18. In the OSPF protocol, inter-area route calculation involves only Router LSA, Network LSA, and Summary LSA.

TRUE

FLASE

19. Which of the following statements regarding OSPF route summarization is false?

OSPF supports two route summarization modes: ABR summarization and ASBR summarization.

Any router in OSPF can summarize routes.

Route summarization is the process of summarizing routes with the same prefix into one route and then advertising only the summarized route to other areas.

Route summarization can reduce routing information, decrease the routing table size, and improve router performance.

20. As shown in the following figure, a new AP is deployed In dual link MSB networking (load balancing mode) .

Which AC will the connect to?

AC1

Random access

None

AC2

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21. Which of the following is the default interval at which the DIS on a broadcast IS_IS network sends CSNPs.

3.3

22. To inject IGP routes into BGP routes, you can only use the network command.

TRUE

FALSE

23. Which of the following statement regarding the display ospf peer command output is true?

Address: 10.1,1.1 Indicates that the local interface address is 10.1.1.1.

Through negotiation during DD packet exchange, the local end becomes the slave.

Router ID indicates that the local router ID Is 10.1.1.1.

The DR address is 10.1.1.1

24. A switch runs MSTP. The configuration is shown in the figure .

What is the role of this switch in MSTI 1?

Uncertain

Root switch

Non-root switch

Secondary root switch