Which two statements about IS reachability TLV (TLV 2) and the extended IS reachability (TLV 22) are true?（）A、TLV 22 supports wide metrics.B、TLV 2 is only used in Level 1 routers.C、TLV 22 displays the neighbor's extended areas.D、Only TLV 22 can support the inclusion of sub-TLVs.
Which two statements about IS reachability TLV (TLV 2) and the extended IS reachability (TLV 22) are true?（）
- A、TLV 22 supports wide metrics.
- B、TLV 2 is only used in Level 1 routers.
- C、TLV 22 displays the neighbor's extended areas.
- D、Only TLV 22 can support the inclusion of sub-TLVs.
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