当学生A用两台Star—R2624路由器在做路由器广域网口连通实验时误将本端口路由器V.35线缆的插头插倒了。结果发现PING直连的路由器不通，请问此时需要查看路由器的状态应该是（）
第1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
第2题：
Part of the configuration files for routers testking1 and testking2 are displayed below:If you were to enter the "show interface serial 0" command on router testking1,which of the following will be displayed?（）
A. Serial 0 is down, line protocol is down
B. Serial 0 is up, line protocol is up
C. Open: IPCP, CDPCP
D. LCP closed
E. LCP open
第3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（）
A.端口处于关闭状态
B.物理端口被烧毁
C.两端设备协议不一致
D.路由表中无路由
第4题：
第5题：
A.Serial 0 is up，line protocol is down
B.Serial 0 is down，line protocol is down
C.Serial 0 is down，line protocol is up
D.Serial 0 is administratively down，line protocol is
第6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
第7题：
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
第8题：
A.物理链路有问题
B.接口被管理员shutdown了
C.参数配置不正确
D.没大问题，重启路由器就行了
第9题：
A.line down；line protocol down
B.line down；line protocol
C.line up；line protocol down
D.line up；line protocol up
第10题：