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多項選擇題

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.

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