多选题Which two statements about IS reachability TLV （TLV 2） and the extended IS reachability （TLV 22） are true？（）ATLV 22 supports wide metrics.BTLV 2 is only used in Level 1 routers.CTLV 22 displays the neighbor’s extended areas.DOnly TLV 22 can support the inclusion of sub-TLVs.EOnly TLV 22 can be flooded across L1/L2 boundaries.
多选题
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.
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