Which three IS-IS TLVs are used to support MPLS traffic engineering？ （）
- A、extended TLV 22
- B、extended TLV 23
- C、extended TLV 134
- D、extended TLV 135
- E、extended TLV 136
- F、extended TLV 138
正确答案:A,C,D
答案解析:有
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Which three IS-IS TLVs are used to support MPLS traffic engineering？ （）
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