启动生成树协议的命令是( ) A:Spanning-tree spanning-tree mode rstp B:spanning-tree spanning-tree mode on C:spannin 点我阅读全文
查看生成树中的端口的命令为( ) A:Show spanning-tree B:Show spanning-tree interface f0/1 C:Show spanning-tree f0/1 D:spanning-tree inte 点我阅读全文