Which option is not a valid method to assign the lowest-order 64-bit field of an IPv6 unicast address？（）

多项选择题Whichtworouterssupportcableaccess？（）

A.ME3000
B.UBR10000
C.ASR9000
D.CRS-1
E.ME3600
F.UBR7200

单项选择题AssumethatthePEsareseparatedbyMultipleProuters.HowmanylabelsshouldtheingressPEpushforBPEfunctionality？（）

A.1
B.None
C.3
D.2
E.It depends on the numbers of hops between the ingress and egress PE

单项选择题WhichoptiondescribesabenefitsofIPv6VPNProviderEdge？（）

A.Provider support for intra-AS and CSC scenarios
B.Uses separate signaling plane， which provides more security than IPv4
C.BGP is the preferred routing protocol for connecting two SPs
D.No requirement for a separate signaling plane

单项选择题WhichstatementaboutmulticastVPNistrue？（）

A.The MDT group address should be the same for both address families in the same VRF
B.The MDT group address should be the same for both address families in the different VRFs
C.Configuration of the MDT source on a pre-VRF basis is supported only on IPv6
D.The MDT group address should be different for both address families in the same VRF

单项选择题TwoislandsofIPv6networksthatarerunningISIS（IPv6IGP）mustbeconnectedusingatunneloveranIPv4network.Whichtunnelingmethodcanbeusedtoachievethisgoal？（）

A.GRE tunnels
B.automatic 6 to 4 tunnels
C.ISATAP tunnels
D.manual tunnels （RFC 2893）