多项选择题
Which two models are the models of DiffServ-Award traffic Engineering？（）
A.Class-based Model B.Maximum Allocation Model C.Russian Doll Model D.Global Tunnel Model E.Policy-based Model
单项选择题 WhataretheaddressFamilyIdentifier（AFI）andsubsequentAddressfamilyIdentifierASAFI）valuesfrom VPNv6？（）
多项选择题 WhichthreemodesaretheoperatingmodesofHDLC？（）
多项选择题 WhichtworoutingprotocolssupportMPLStrafficengineeringlinkinformationdistribution？（）
