單項(xiàng)選擇題關(guān)于spanning-tree bpduguard說(shuō)法正確的是()

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(tīng)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


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2.單項(xiàng)選擇題關(guān)于spanning-treebpdufilter,下列那些說(shuō)法是正確的?()

A.既不發(fā)送也不接收BPDU
B.接受并發(fā)送BPDU;不發(fā)送
C.但監(jiān)聽(tīng)BPDU,一旦收到BPDU后,就恢復(fù)參與生成樹(shù)的計(jì)算
D.配置了spanning-treebpdufilter的接口,可以防止環(huán)路