A.Listening B.Backup C.Learning D.Alternate
A.Forwarding B.Learning C.Listening D.Blocking
A.發(fā)送并接收BPDU,僅當(dāng)收到自己發(fā)出的BPDU報(bào)文后,才會(huì)將端口disable掉 B.不發(fā)送但監(jiān)聽BPDU,不論收到誰(shuí)發(fā)出的BPDU,都會(huì)將接口disable掉 C.發(fā)送并接收BPDU,不論收到誰(shuí)發(fā)出的BPDU,都會(huì)將接口disable掉