单项选择题

Acustomerindicatestheyrunamission-criticalapplicationwhichmarksitspacketsbest-effort(DSCP=0).Howcanyouguaranteedeliveryofthistraffic?()

A.Remarkthetrafficoningressandprioritizeonegress.
B.EnableCEFandNetflow.
C.ConfiguretheMS-WindowsQoSSchedulertoprioritizethistraffic.
D.EnableWRED.
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