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[学习交流] CCNA640-802 V12题库试题分析6(艾迪飞吴老师讲解)

1.  While troubleshooting a network connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message "Request timed out." is displayed. At which layer of the OSI model does the problem most likely exist?

A. the session layer

B. the protocol layer

C. the data link layer

D. the access layer

E. the network layer

F. the application layer

Answer: E

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While troubleshooting a network connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message "Request timed out." is displayed. At which layer of the OSI model does the problem most likely exist?

A. the session layer

B. the protocol layer

C. the data link layer

D. the access layer

E. the network layer

haohao

hao 好的不得了,佩服
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快没耐心了啊

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