问答题 youwanttoviewthestatusofaframerelayconnection.HowtodisplaythestatusofaFrame-RelayPVC？
多项选择题 ThenetworkadministratoristryingtoaddSwitch1tothenetwork，butthe802.1Qtrunkisnotcomingup.Switch1waspreviouslytestedinthelaboratoryanditstrunkconfigurationworkedfine.Whatarethreepossiblecausesofthisproblem？（）
问答题 WhatisthePMTUDforIPv6network？