If the design must support an MPLS network with six classes, and CEs will be managed by the service provider, which QoS policy should be recommended?

You are tasked to design a QoS policy for a service provider so they can include it in the design of their MPLS core network.

If the design must support an MPLS network with six classes, and CEs will be managed by the service provider, which QoS policy should be recommended?
A . map IP CoS bits into the IP Precedence field
B. map flow-label bits into the Exp field
C. map IP precedence bits into the DSCP field
D. map DSCP bits into the Exp field

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Answer: D