单项选择题
Which statement about implementing the Cisco IPv6 provider Edge Router over MPLS is true？（）
A.6PE feature is supported over tunnels other than RSVP-TE tunnels B.Core MPLS routers are supporting IPv6 ONLY C.6PE feature is not supported over tunnels other than RSVP-TE tunnels D.Core MPLS routers are supporting IPv4 only
多项选择题 WhichtwostatementsaboutLayer3MPLSVPNaretrue？（）
多项选择题 WhichfourstatementsaboutEthernetvirtualcircuit（EVC）infrastructurearetrue？（）
单项选择题 WhichofthefollowingisusedtoperiodicallymulticastbyDISonaLANtoensureIS-ISlinkstatedatabaseaccuracy？（）
