WhichstatementcorrectlydescribestheCiscoimplementationofRSTP?()A.PortFast，UplinkFast，andBackboneFastspecificconfigurationsareignoredinRapidPVSTmode.B.RSTPisenabledgloballyandusesexistingSTPconfiguration.C.Rootandalternativeportstransitionimmediatelytothef
题目
WhichstatementcorrectlydescribestheCiscoimplementationofRSTP?()
A.PortFast，UplinkFast，andBackboneFastspecificconfigurationsareignoredinRapidPVSTmode.
B.RSTPisenabledgloballyandusesexistingSTPconfiguration.
C.Rootandalternativeportstransitionimmediatelytotheforwardingstate.
D.Convergenceisimprovedbyusingsub-secondtimersfortheblocking，listening，learning，andforwardingportstates.