Drag and drop the Qos mechanisms from the left to the correct descriptions on the right.

policy map: mechanism to create a scheduler for packets prior to forwarding

service policy: mechanism to apply a QoS policy to an interface

DSCP: portion of the IP header used to classify packets

shaping: bandwidth managment techique which delays datagrams

policing: tool to enforce-rate-limiting on ingress/egress

Cos: portion of the 802.1Q header used to classiify packets