多选题What are three TLVs that support IS-IS extensions for traffic engineering?（）AExtended IS reachabilityBExtended IP reachabilityCTraffic engineering opaqueDTraffic engineering router IDEExtended MPLS reachability
题目
多选题
What are three TLVs that support IS-IS extensions for traffic engineering?（）
A
Extended IS reachability
B
Extended IP reachability
C
Traffic engineering opaque
D
Traffic engineering router ID
E
Extended MPLS reachability