A．t which layer of the OSI model does the protocol that provides the information displayed by the "show cdp neighbors" command operate?

A．Transport

B．Physical

C．Application

D．Data link

E．Network

[单选题]Which OSI layer does a Router operate at?A．the Physical LayerB．the Data Link LayerC．the Transfer LayerD．the Network Layer

[单选题]Which OSI layer does a bridge operate at?A．the Physical LayerB．the Network LayerC．the Transport LayerD．the Data Link Layer

[单选题]is a six bytes OSI layer 2 address which is burned into every networking device that provides its unique identity for point to point communication。A．The virtual addressB．The subnet addressC．The MAC addressD．The IP address

[单选题]( ) is a six bytes OSI layer 2 address which is burned into every networkin

[单选题]( )is a six bytes OSI layer 2 address which is burned into every networking

[单选题] OSI is a theoretical model that shows how any two different systems can communicate with each other．Router, as a networking device, operate at the (71) layer of the OSI model．(71)A．transportB．applicationC．networkD．physical

[单选题]Which is the second layer from the bottom in Open System Interconnection Reference Model? (71)．(71) A. ApplicationB．Data linkC．NetworkD．Session

[单选题]Which of the following is included in a present model:A.Enterprisevalue.B.F

[单选题]OSI is a theoretical model that shows how any two different systems can communicate with each other. Router, as a networking device, operate at the ______ layer of the OSI model.A．transportB．applicationC．networkD．physical

[单选题]Which of the following does not contain a non-finite clause?A．He swims in the river every day.B．Do you mind my shutting the door?C．It's been nice talking to you.D．There being nothing to do, he left.