• [单选题]On a half-duplex Ethernet LAN, two hosts attempt to send data simultaneously, resulting in a collision. Following this collision, what will the hosts do? (Select all valid answers)
  • 正确答案 :C
  • The hosts will attempt to resume transmission after a time delay has expired.

  • 解析:C 解析:Explanation:

  • [单选题]关于OSPF中DR的说法不正确的是()
  • 正确答案 :B
  • 如果某路由器优先级比DR优先级高,但启动晚,它会抢占原来的DR自己成为DR


  • [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]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]路由器“全局模式”的提示符为()
  • 正确答案 :C
  • (config)


  • [单选题]EIGRP的管理距离()
  • 正确答案 :C
  • 110


  • [单选题]OSI七层模型中,传输层的数据封装名称为()
  • 正确答案 :D

  • [单选题]路由器“特权模式”的提示符是:()
  • 正确答案 :B

  • [多选题]You need to configure an 802.1Q link on a Ezonexam switch. Which commands, when used together, would do this? (Select two answer choices)
  • 正确答案 :CD
  • Switch(config-if) switchport mode trunk

    Switch(config-if) switchport trunk encapsulation dot1q

  • 解析:C,D 解析:Explanation:

  • [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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