Mod, pls fix the answer.
Correct answer imo,
DSCP == portion of the IP header used to classify the packets
policy map == mechanism to create a scheduler for packets prior to forwarding
service policy == mechanism to apply a QoS policy to an interface
A policy map is used to perform an action (permit, deny, and so on). A service policy is a used to apply a policy on either all interfaces or a single interface
service-policy
To attach a policy map to an input interface, a virtual circuit (VC), an output interface, or a VC that will be used as the service policy for the interface or VC, use the service-policy command in the appropriate configuration mode. To remove a service policy from an input or output interface or from an input or output VC, use the no form of this command.
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