单项选择题
A.learning state
B.listening state
C.forwarding state
D.root-inconsistent state
多项选择题 Which two of these areusedintheselectionofarootbridgeinanetworkutilizingSpanningTreeProtocolIEEE802.1D？（）
单项选择题 WhichofthesebestdescribestheactionstakenwhenaVTPmessageisreceivedonaswitchconfiguredwiththeVTPmode"transparent"？（）
单项选择题 WhenSTPUplinkFastisenabledonaswitchutilizingthedefaultbridgepriority，whatwillthenewbridgeprioritybechangedto？（）