ChoosethetruestatementregardingQoSpre－classify.()

A.QoSpre-classifypermitsmakingQoSdecisionsbasedonelementsfromtheunencryptedIPpacket.

B.QoSpre-classifyisrequiredwhenencryptingvoice.

C.QoSpre-classifyisanadvantagetoServiceProviderstransportingencryptedpackets.

D.QoSpre-classifyisnotdesignedforIPSec/GREconfigurations.