单项选择题
A.Reload the active VLAN configuration
B.Clear the affected port and bring it up again
C.Explicitly set the trunk for the VLAN to be on
D.Remove all the VLANs set
多项选择题 Youhaveatrunklinkoperatingbetweentwoswitchesandyou’reexperiencingproblemswithframesleakingbetweenthetwoVLANs.Eachswitchhasidenticalmodules，softwarerevisionsandVLANconfigurationinformation.SpanningtreeprotocolisdisabledonallVLANs.Whatisprobablycausingthisproblem？（）
单项选择题 You’reanetworkadministerandyouissuethecommand（showport3/1）onanEthernetport.Toyoursurpriseyounoticeanon-zeroentryinthe’Giants’column.Whatcouldbethecauseofthis？（）
多项选择题 Inthenetwork，VLANTrunkingProtocol（VTP）isrunningwithadomainnameofR1.VLANs1，2，3，4，5，10，20areactiveonthenetwork.Suddenlythewholenetworkgoesdown.NotrafficisbeingpassedonVLANs2，3，4，5，10，20.However，trafficpassesonVLAN1andindicatesallswitchesareoperational.Rightbeforethenetworkproblemoccurred；aswitchnamedSW13wastakenoutofthelabandaddedtothenetwork.WhatthreeconfigurationissuesonSW13couldbecausingthenetworkoutage？（）