正确答案: B

会变成“administratively down”状态

题目：如果把路由器的某个端口的IP配置为：192.168.10.64，掩码配置为：255.255.255.248，则该端口（）

解析：B

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举一反三的答案和解析：

[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.

[单选题]TELNET工作在OSI哪一层（）

应用层

[单选题]路由器上“水平分割”的功能是：()

阻止路由环路

[单选题]After logging into a router and typing in a few show commands, you press the up arrow key. What will this do?

It will recall the previous command line

解析：解析：Explanation:

[单选题]交换机上VLAN的功能描述中，正确的是（）

可以减少广播对网络性能的影响