单项选择题 IfaportconfiguredwithSTPloopguardstopsreceivingBPDUs，theportwillbeputintowhichstate？（）
多项选择题 Which two of these areusedintheselectionofarootbridgeinanetworkutilizingSpanningTreeProtocolIEEE802.1D？（）
单项选择题 WhichofthesebestdescribestheactionstakenwhenaVTPmessageisreceivedonaswitchconfiguredwiththeVTPmode"transparent"？（）