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单选题Which of the following network devices operates on Layer 1 of the OSI model？（）A HubB SwitchC RouterD Bridge

题目
单选题
Which of the following network devices operates on Layer 1 of the OSI model？（）
A

Hub

B

Switch

C

Router

D

Bridge

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相似问题和答案

第1题：

WhichofthefollowingnetworkdevicesoperatesonLayer1oftheOSImodel?()

A.Hub

B.Switch

C.Router

D.Bridge


参考答案：A

第2题：

Which of the following statements regarding routed and routing protocols are true?()

A. A routed protocol is assigned to an interface and determines the method of packet deliver.

B. A routing protocol determines the path of a packet through a network.

C. A routed protocol determines the path of a packet through a network.

D. A routing protocol operates at the transport layer of the OSI model.

E. A routed protocol updates the routing table of a router.


参考答案：A, B

第3题：

Which of the protocols below, operates at Layer 2 of the OSI model, and is used to maintain a loop-free network?

A. RIP

B. STP

C. IGRP

D. CDP

E. VTP

F. None of the above


正确答案：B
B 解析：Explanation:
STP (spanning tree protocol) operates on layer 2 to prevent loops in switches and bridges.

Incorrect Answers:
A, C. RIP and IGRP are routing protocols, which are used at layer 3 to maintain a loop free routed environment.

D. CDP does indeed operate at layer 2, but it doest not provide for a loop free topology. CDP is used by Cisco devices to discover information about their neighbors.

E. VTP is the VLAN Trunking Protocol, used to pass VLAN information through switches. It relies on the STP mechanism to provide a loop free network.

第4题：

Which OSI layer does a bridge operate at?

A．the Physical Layer

B．the Network Layer

C．the Transport Layer

D．the Data Link Layer


正确答案：D

第5题：

Which of the following layers of the TCP／IP model most closely corresponds to the network layer of the OSI model?()

A.Application

B.Internet

C.Transport

D.Network

E.Data Link


参考答案：B

第6题：

Which of the following layers of the OSI model is the presentation layer?()

A.Layer 1

B.Layer 5

C.Layer 6

D.Layer 7


参考答案：C

第7题：

At Layer 2 of the OSI model, which component connects a host to the network media?()

A. Hub

B. Switch

C. Bridge

D. NIC

E. Transceiver


参考答案：D

第8题：

Which of the following devices should an administrator connect to a protocol analyzer in order tocollect all of the traffic on a LAN segment?()

A.Hub

B.VLAN

C.Router

D.Server


参考答案：A

第9题：

Which three of the following OSI model layers also belong to the TCP／IP model?()

A. The application layer

B. The session layer

C. The data link layer

D. The transport layer

E. The network interface layer

F. The physical layer


参考答案：A, D, E

第10题：

Which of the following layers of the OSI model is the presentation layer?（）

  • A、Layer 1
  • B、Layer 5
  • C、Layer 6
  • D、Layer 7

正确答案:C

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