多项选择题

WhichtwostatementsaboutISreachabilityTLV（TLV2）andtheext……

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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A.63
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