正确答案: C

Cisco2501上提供一个100Mbit/s的快速以太网端口

题目：下面对Cisco2621路由器和Cisco2501路由器描述中，错误的是（）

解析：C

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学习资料的答案和解析：

[单选题]哪一个命令可以设置路由器特权用户的“明文密码”（）

enable password

[单选题]A receiving host has failed to receive all of the segments that it should acknowledge.What can the host do to improve the reliability of this communication session?

Decrease the window size

解析：解析：Explanation:

[单选题]A Ezonexam 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?

Data link

解析：解析：Explanation:Asthequestionstatesthatseriallineisup,itmeanstheproblemisnotontheNetworklayer.Theadministratorcannotseeanyoutputbyissuingtheshowcdpneighborscommand.ItmeansthatCDPisdisabledandCDPisaprotocolthatrunsoverLayer2(thedatalinklayer)onallCiscorouters,bridges,accessservers,andswitches.