多项选择题

WhichtwostatementsarecorrectregardingIS-IS?()

A.Routersmaintainasinglelink-statedatabaseperareA.B.RoutersmaintainaseparateLevel1link-statedatabasE.
C.RoutersmaintainaseparateLevel2link-statedatabasE.
D.RoutersmaintainasingleLevel1link-statedatabaseperareA.
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