铁路电务系统考试

单选题如果对TDCS协议转换器打环，显示“line protocol is up（looped）”，则表示（）。A 打环成功，路由器正常B 路由器故障C 协议故障D 通信正常

题目
单选题
如果对TDCS协议转换器打环，显示“line protocol is up（looped）”，则表示（）。
A

打环成功，路由器正常

B

路由器故障

C

协议故障

D

通信正常

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1题：

While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface to be?（）

A. Serial 0 is up, line protocol is up

B. Serial 0 is up, line protocol is down

C. Serial 0 is down, line protocol is down

D. Serial 0 is down, line protocol is up

E. Serial 0 is administratively down, line protocol is down

F. Serial 0 is administratively down, line protocol is up


参考答案：E

第2题：

While logged into a router you manually shut down the serial 0 interface using the "shutdown" interface configuration command. You then issue the "show interface serial 0" command in exec mode. What could you expect the status of the serial 0 interface to be?（）

  • A、Serial 0 is up, line protocol is up
  • B、Serial 0 is up, line protocol is down
  • C、Serial 0 is down, line protocol is down
  • D、Serial 0 is down, line protocol is up
  • E、Serial 0 is administratively down, line protocol is down
  • F、Serial 0 is administratively down, line protocol is up

正确答案:E

第3题：

如果链路的一端被管理DOWN,你将看到的另一端接口状态输出信息是()

A.interface is down，line protocol is down

B.interface is down，line protocol is up

C.interface is up，line protocol is down

D.interface is up，line protocol is up


参考答案：C

第4题：

TDCS中show interface命令查看路由器接口，如果显示Ethernet0 is up则表示（）。

  • A、接口故障
  • B、接口正常
  • C、协议正常
  • D、协议故障

正确答案:B

第5题：

如果执行了show interface serial 0命令而且出现了消息“Serial line is up，line protocol is up”，对于这条消息的正确解释是什么？（）

  • A、链路正在接收和发送数据
  • B、路由器已经正确配置了本地管理接口
  • C、连接处于激活状态

正确答案:C

第6题：

当用户端cisco路由器上用showinterface命令时line和lineprotocal可能出现的几种组合?()。

A.line down；line protocol down

B.line down；line protocol

C.line up；line protocol down

D.line up；line protocol up


参考答案：A, C, D

第7题：

在路由器上运行了show int Ethernet 0命令后，提示Ethernet 0 is up line protocol is down，则表示（）

  • A、端口正常
  • B、连接故障，路由器未接到LAN上
  • C、接口故障
  • D、接口被人为地关闭

正确答案:B

第8题：

Which line from the output of the show ip interface command indicates that there is a Layer 1 problem?

A．Serial0/1 is up, line protocol is down

B．Serial0/1 is down, line protocol is down

C．Serial0/1 is up, line protocol is up

D．Serial0/1 is administratively down, line protocol is down

E．None of the above


正确答案：B
解析：Explanation:
When the physical interface itself is down, then the problem is related to layer 1. When it is up, but the line protocol is down, then the problem is related to layer 2.

第9题：

下列（）状态是不可能在路由器的串行端口状态见到的。

  • A、 Interface is up， line protocol is up
  • B、 Interface is down， line protocol is down
  • C、 Interface is down， line protocol is up
  • D、 Interface is up， line protocol is down

正确答案:C

第10题：

对协议转换器打（）环，是指在BNC接头处使用环路连接收发接头设置的环路，属于物理环路。


正确答案:硬

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