题目内容（请给出正确答案）

[单选题]

WhichtwostatementsaboutISreachabilityTLV（TLV2）andtheextendedISreachability（TLV22）aretrue？（）

A.TLV22supportswidemetrics.

B.TLV2isonlyusedinLevel1routers.

C.TLV22displaystheneighbor’sextendedareas.

D.OnlyTLV22cansupporttheinclusionofsub-TLVs.

E.OnlyTLV22canbefloodedacrossL1/L2boundaries.

提问人：网友adam8616 发布时间：2022-01-07

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· 有3位网友选择 E，占比33.33%
· 有2位网友选择 C，占比22.22%
· 有2位网友选择 B，占比22.22%
· 有1位网友选择 A，占比11.11%
· 有1位网友选择 D，占比11.11%

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