计算机通信专业技术
单选题当学生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 downB Serial 0 is down，line protocol is downC Serial 0 is down，line protocol is upD Serial 0 is administratively down，line prot
题目
单选题
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