题目内容：
A.VoiceVLANsareonlyusedwhenconnectinganIPphoneandahosttodistinctswitchports
B.AccessportsthatareconfiguredwithvoiceVLANswillalwaystrusttheCoSthatisreceivedfromIPphones
C.AccessportsthatareconfiguredwithvoiceVLANsmayormaynotoverridetheCoSvaluethatisreceivedfromanIPphone
D.VoiceVLANsareconfiguredusingtheswitchportvoicevlanvlan-IDinterfaceconfigurationcommand
E.VoiceVLANsprovideatrunkinginterfacebetweenanIPphoneandanaccessportonaswitchtoallowtrafficfrommultipledevicesthatareconnectedtotheport
F.EnablingVoiceVLANonaswitchportwillautomaticallyconfiguretheporttotrusttheincomingCoSmarkings
参考答案：【答案仅供学习，请勿对照自行用药等】