单项选择题
If a port configured with STP loop guard stops receiving BPDUs，the port will be put into which state？（）
A.learning state B.listening state C.forwarding state D.root-inconsistent state
多项选择题 WhichtwooftheseareusedintheselectionofarootbridgeinanetworkutilizingSpanningTreeProtocolIEEE802.1D？（）
单项选择题 SpanningTreeProtocolIEEE802.1sdefinestheabilitytodeploywhichofthese？（）
问答题 BGPAdministrativedistance？
