Which two implementations are standard Virtual Private LAN Service （VPLS） implementations that aresupported by the IETF？（）

A.highest router ID first， then highest priority
B.highest MAC address first， then highest priority
C.highest router ID first， then highest MAC address
D.highest priority first， then highest router ID
E.highest priority first， then highest MAC address

A.Route tagging is one of the techniques used by RTBH
B.It is used for BGP authentication
C.It cannot work with static routes
D.It uses extended ACLs for blocking attacks by creating a black hole
E.Before configuring RTBH LDP must be enabled on the interface

A.path monitoring
B.tandem connection monitoring activation deactivation （TCM ACT）
C.Payload Structure Identifier （PSI）
D.multiframe alignment signal （MFAS）
E.section monitoring