单项选择题
A TestKing.com technician is troubleshooting connectivity problems between two routers that are directly connected through the serial line. The technician notices that the serial line is up but cannot see any neighbors displayed in the output of the show cdp neighbors command.
In which OSI layer is the problem most likely occurring?（）
A. Physical
B. Data link
C. Network layer
D. Transport layer
E. Application layer
点击查看答案
相关考题
-
单项选择题
Which layer of the OSI reference model is responsible for ensuring reliable end-to-end delivery of data?（）
A.Application
B.Presentation
C.Session
D.Transport
E.Network
F.Data-Link -
单项选择题
You download a file from an FTP site on the Internet. What is the highest layer in the OSI model used in this FTP operation?（）
A. Application
B. Presentation
C. Session
D. Transport
E. Internet
F. Data Link
G. Physical -
单项选择题
While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."At which OSI layer is this problem associated with?（）
A. The data link layer
B. The application layer
C. The access layer
D. The session layer
E. The network layer
