• [单选题]下列关于路由器和交换机的描述中,错误的是()
  • 正确答案 :D
  • 交换机可以转发广播


  • [多选题]Two stations on the Ezonexam LAN transmit at the same time, resulting in a collision. What happens when a collision occurs on the network? (Choose all that apply)
  • 正确答案 :BDE
  • A jam signal informs all devices that a collision occurred.

    The devices that are involved in the collision stops transmitting for a short time.

    The collision invokes a random back-off algorithm.

  • 解析:解析:Explanation:

  • [单选题]把指定端口添加到VLAN的命令是:()
  • 正确答案 :D
  • switch port


  • [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?
  • 正确答案 :A
  • It will recall the previous command line

  • 解析:解析:Explanation:

  • [单选题]PPP工作在OSI的哪一层()
  • 正确答案 :B
  • 数据链路层


  • [单选题]访问控制列表分为标准和扩展两种。下面关于ACL的描述中,错误的是()。
  • 正确答案 :C
  • 标准ACL可以根据分组中的IP目标地址进行过滤


  • [单选题]路由器上,命令“show int s0”的显示结果为:Serial0 is up,line protocol is down出现该结果的可能原因是()
  • 正确答案 :C
  • 两端设备协议不一致


  • [单选题]Ezonexam has implemented the use of the Virtual Trunking Protocol (VTP). Which statement below accurately describes a benefit of doing this?
  • 正确答案 :B
  • VTP will allow switches to share VLAN configuration information


  • [单选题]哪个命令可以成功测试网络:()
  • 正确答案 :B
  • Routerping192.5.5.30


  • [单选题]TCP23是()协议端口号;UDP69是()端口号;TCP80是()端口号。
  • 正确答案 :C
  • TELNET TFTP HTTP


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