Which statement correctly describes the function of a policer?

A.
It defines a set of parameters, including transmission rate, queue priority, delay buffers, and
congestion management and avoidance.

B.
It provides a first stage of congestion management by controlling the amount of traffic entering
a device.

C.
It writes a value into an outbound packet’s CoS field according to the packet’s forwarding class
and loss priority.

D.
It determines the amount of bandwidth allocated to a queue.

Explanation: