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


  • [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?
  • 正确答案 :B
  • Data link

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

  • [单选题]当在一个接口上使用ipaccess-group99in命令时,以下哪条关于所引用访问控制列表的描述是正确的()
  • 正确答案 :C
  • 这个列表是编号型标准ACL,检查进入接口的数据包


  • [多选题]Which of the following statements correctly describe the differences between half-duplex and full-duplex Ethernet? (Select two answer choices.)
  • 正确答案 :BD
  • Half-duplex Ethernet uses a loopback circuit to detect collisions.

    Full-duplex Ethernet makes use of two pairs of wires for data.

  • 解析:解析:Explanation:

  • [单选题]The IP network 210.106.14.0 is subnetted using a /24 mask. How many usable networks and host addresses can be obtained from this?
  • 正确答案 :A
  • 1 network with 254 hosts

  • 解析:解析:Explanation:Asubnetwith24bitsonwouldbe255.255.255.0.SincethisisaclassCnetwork,thissubnetcanhaveonly1networkand254usablehosts.

  • [多选题]对于IP为199.41.27.0,子网掩码为255.255.255.240,则该IP地址和子网掩码相作用会得到一系列IP,从下列选项中选出属于“有效IP”的选项:()
  • 正确答案 :ABCD
  • 199.141.27.33

    199.141.27.112

    199.141.27.119

    199.141.27.126

  • 解析:ABCD

  • [单选题]帧中继环境中,CIR的含义是()
  • 正确答案 :B
  • 保证线路速率


  • [单选题]混合型协议既具有“距离矢量路由协议”的特性,又具有“链路状态路由协议”的特性,下列协议中属于混合型协议的是:()
  • 正确答案 :C
  • EIGRP


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

  • [单选题]在OSPF的DR/BDR选举过程中,在路由器有相同的接口优先级情况下,什么用于确定DR或BDR()
  • 正确答案 :D
  • 路由器ID


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