多项选择题
A.The RT is a BGP extended community.
B.The RT is an 8-byte field that is prefixed to an IPv4 address to make it a unique VPNv4 address.
C.When a VPN route that is learned from a CE router is injected into BGP， one or more RTs are associated with it
D.The distribution of VPN routing information is controlled through the use of VPN RTs
E.When a VPN route that is learned from a CE router is injected into BGP， there is always one RT that is associated with it.
多项选择题 WhichthreeofthesearetypesofEthernetVirtualConnections（EVCs）intheMEFconcept？（）
单项选择题 CiscoIOSXRhasimplementedanonstoproutingfeaturesothatwhenRPfailoveroccurs，theroutinginformationcanberecoveredlocally.WhichprotocoldoesnotsupporttheNSRfeature？（）
单项选择题 WhichstatementaboutFrameRelayisnottrue？（）