选择题:YouhavebeentaskedwithsettingatrustboundaryontheCompanynetwork.Whatisthebasicfunctionofthistrustboundary?()

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题目内容:
A.TrustboundariesarepointsinthenetworkwhereLayer2CoSmarkingsareconvertedtoLayer3DSCPorIPprecedencemarkings.

B.TrustboundariesareapointinthenetworkwhereQoSfunctionalitybeginsandends.

C.Trustboundariesdeterminewhethercertaintypesoftrafficcanpass.

D.TrustboundariesareapointinthenetworkwheredecisionsaboutCoSmarkingsonincomingpacketsaremade.

E.Noneoftheotheralternativesapply




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