單項選擇題路由器查看端口狀態(tài),下面()表示端口處于關(guān)閉狀態(tài)(以S0/3/0口為例)。

A.S0/3/0 is down,line protocol is down
B.S0/3/0 is up,line protocol is down
C.S0/3/0 is up,line protocol is up
D.S0/3/0 is administratively down,line protocol is down


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1.單項選擇題路由器查看端口狀態(tài),下面()表示物理線路有問題(以S0/3/0口為例)。

A.S0/3/0 is down,line protocol is down
B.S0/3/0 is up,line protocol is down
C.S0/3/0 is up,line protocol is up
D.S0/3/0 is administratively down,line protocol is down

2.單項選擇題路由器查看端口狀態(tài),下面()表示物理和數(shù)據(jù)層都沒有問題(以S0/3/0口為例)。

A.S0/3/0 is down,line protocol is down
B.S0/3/0 is up,line protocol is down
C.S0/3/0 is up,line protoco li sup
D.S0/3/0 is administratively down,line protocol is down

4.單項選擇題路由器退出配置模式使用()命令。

A.exit
B.enable
C.ping
D.reload