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TheOSPFExternalLSAforprefixx.x.x.xexistsintheOSPFdatabase，buttheprefixisnotinstalledintheroutingtable.Whicharepossibleexplanations？（）

A.Inbounddistribute-listisconfiguredundertheospfprocessanditisdenyingx.x.x.x
B.ASBRoriginationtheLSAisnotreachable
C.RoutetotheForwardingAddressinnotaninternalOSPFroute
D.RoutetotheForwardingAddressisaninternalOSPFroute
E.RoutetotheASBRdoesnotfollowthesamepathastheonetotheForwardingAddress

【参考答案】

A, B, C

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