Which layer of the OSI reference model does Ethernet switches work in ?
Which layer of the OSI reference model does Ethernet switches work in ?A . Physical LayerB . Data link layerC . Network layerD . Transport LayerView AnswerAnswer: B
Ethernet technology is a widely used technology, according to the different transmission rate, there are three classes of 10M, 100M, 1000M, including 10M and 100M Ethernet transmission medium is commonly used for twisted pair, but due to high speed of 1000M Ethernet ,the transmission medium must use optical fiber.
Pdfprep2020-12-18T12:05:52+00:00Ethernet technology is a widely used technology, according to the different transmission rate, there are three classes of 10M, 100M, 1000M, including 10M and 100M Ethernet transmission medium is commonly used for twisted pair,...
Which of the following does not belong to the scope of the communication network?
Pdfprep2020-12-12T17:52:24+00:00Which of the following does not belong to the scope of the communication network?A . Telephone NetworkB . Internet NetworkC . Radio and Television NetworkD . National GridView AnswerAnswer: D
Which statement about IP routing statement is true?
Pdfprep2020-12-08T10:39:31+00:00Which statement about IP routing statement is true?A . Routing is the concept of the second layer in the OSI model.B . Any of the routing must include the following three parts information: source...
Link layer defines the electrical, mechanical process and function, to realize line activation, keeping and demolition on both ends of system connection.
Pdfprep2020-12-07T08:41:37+00:00Link layer defines the electrical, mechanical process and function, to realize line activation, keeping and demolition on both ends of system connection.A . TrueB . FalseView AnswerAnswer: B
ICMP is a link layer protocol, ICMP message is triggered by the physical layer, and then respond by IP layer or a higher layer protocol.
Pdfprep2020-12-07T04:09:19+00:00ICMP is a link layer protocol, ICMP message is triggered by the physical layer, and then respond by IP layer or a higher layer protocol.A . TrueB . FalseView AnswerAnswer: B
Which layer of the OSI model does the router manly work in ?
Pdfprep2020-12-01T14:18:22+00:00Which layer of the OSI model does the router manly work in ?A . Physical LayerB . Link LayerC . Network layerD . Transport LayerView AnswerAnswer: C
MAC address is composed of 48 bit, usually showed in 12 hexadecimal, the first six hexadecimal digits by the IEEE in charge of unified distribution, used to determine the uniqueness of the manufacturers, the last six hexadecimal digits by the manufacturers responsible for their own management.
Pdfprep2020-11-26T12:42:01+00:00MAC address is composed of 48 bit, usually showed in 12 hexadecimal, the first six hexadecimal digits by the IEEE in charge of unified distribution, used to determine the uniqueness of the manufacturers, the...
MAC address of computer network card is unified assigned to each manufacturer by IETF, globally unique.
Pdfprep2020-11-23T01:42:43+00:00MAC address of computer network card is unified assigned to each manufacturer by IETF, globally unique.A . TrueB . FalseView AnswerAnswer: B
LAN computers in judging the received broadcast frame is the method whether they should receive, judge whether the source MAC address of the frame is the same as the hardware address of the machine.
Pdfprep2020-11-23T00:51:11+00:00LAN computers in judging the received broadcast frame is the method whether they should receive, judge whether the source MAC address of the frame is the same as the hardware address of the machine.A...