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单项选择题当学生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()

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

  • A
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