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多项选择题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.

E、 Only TLV 22 can be flooded across L1/L2 boundaries.

  • A,D
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