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多项选择题Which two statements about RPF checks in Multicast Source Discovery Protocol （MSDP） are true？（）

A、It prevents message looping， Session Advertisement （SA）messages must be RPF checked

B、RPF check should be done against the route to the source S of the corresponding PIM-SM domain

C、RPF check should be done against the route to the Rendez-vous Point of the corresponding PIM-SM domain，which originated the SA

D、RPF checking Session Advertisement （SA） messages will cause message looping

  • A,C

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