单项选择题
A. provide service internetworking
B. support transparency for Layer 2 frames
C. indicate destination as a connection identifier
D. map to the DLCI in service internetworking
单项选择题 WhichofthesestatementsbestdescribesVPLS？（）
多项选择题 WhichtwobenefitsdoesVoFRprovide？（）
单项选择题 AFibreChannelfabric（orFibreChannelswitchedfabric，FC-SW）isaswitchedfabricofFibreChanneldevicesenabledbyaFibreChannelswitch.FabricsarenormallysubdividedbyFibre Channelzoning.Eachfabrichasanameserverandprovidesotherservices.HigherredundancyoverFC-AL，P2P.WhichpathselectionprotocolisusedbyFibreChannelfabrics？（）