单项选择题
A. Cisco AV-pair
B. TACACS+ or RADIUS ack frame role attribute
C. DH-CHAP challenge attribute
D. privilege level attribute
多项选择题 ConsistencychecksandcompatibilitychecksareperformedbeforeaVirtualPortChannel（vPC）iscreated.Duringacompatibilitycheck，onevPCpeerconveysconfigurationinformationtotheothervPCpeerinordertoverifythatvPCmemberportscanactuallyformaPortChannel.Whichstatementsabouta"VirtualPortChannelgracefulconsistentcheck"aretrue？（）
多项选择题 WhichtwostatementsaboutVACLsonCiscoNexus7000SeriesSwitchesaretrue？（）
多项选择题 OverlayTransportVirtualization（OTV）providesanoverlaythatenablesLayer2connectivitybetweenseparateLayer2domains，whilekeepingthesedomainsindependentandpreservingthefaultisolation，resiliency，andload-balancingbenefitsofanIP-basedinterconnection.WhichstatementsaretrueaboutOTVAdjacencyServer？（）