• [单选题]标准访问控制列表应被放置的最佳位置是在()。
  • 正确答案 :B
  • 越靠近数据包的目的地越好


  • [单选题]在路由器上,命令show access-list的功能是()
  • 正确答案 :A
  • 显示访问控制列表内容


  • [单选题]备份路由器IOS的命令是:()
  • 正确答案 :A
  • copy flash tftp


  • [单选题]关于帧中继的说法,正确的是()
  • 正确答案 :C
  • 可以偷占带宽


  • [单选题]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?
  • 正确答案 :E
  • The network layer

  • 解析:解析:Explanation:

  • [多选题]CDP is being used throughout the Ezonexam network. What are two reasons why the Ezonexam network administrator would use CDP? (Choose two)
  • 正确答案 :BD
  • To obtain the IP Address of a connected device in order to telnet to the device

    To verify Layer 2 connectivity between two devices when Layer 3 fails


  • [单选题]帧中继环境下,为了区分虚电路,应该使用的地址是()
  • 正确答案 :C
  • DLCI


  • [单选题]命令“ping127.0.0.1”的功能是()
  • 正确答案 :C
  • 测试TCP/IP协议是否正常


  • [单选题]在路由表中到达同一网络的路由有:静态路由、RIP路由、IGRP路由,OSPF路由,则路由器会选用哪条路由传输数据:()
  • 正确答案 :A
  • 静态路由


  • [单选题]What is the purpose of the spanning-tree algorithm in a switched LAN?
  • 正确答案 :C
  • To prevent switching loops in networks with redundant switched paths.

  • 解析:解析:Explanation:STPisusedinLANswithredundantpathsorroutestopreventloopsinalayer2switchedorbridgedLAN.IncorrectAnswers:A,B:TheprimarypurposeofSTPistopreventloops,notformonitoringormanagementofswitchesorVLANs.D.VLANsareusedtosegmentaLANintomultiplecollisiondomains,buttheSTPprocessalonedoesnotdothis.E.Routersareusedtopreventroutingloopsatlayer3oftheOSImodel.STPoperatesatlayer2.

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