Refer to the exhibit. Voice traffic is marked “precedence 5.” How much bandwidth is allocated for voice traffic during periods of congestion?

A.
a minimum of 48 kb/s

B.
a maximum of 48 kb/s

C.
a minimum of 48% of the available bandwidth

D.
a maximum of 48% of the available bandwidth

Explanation:
During congestion conditions, the traffic class is guaranteed bandwidth equal to the specified rate. (Recall that bandwidth guarantees are only an issue when an interface is congested.) In other words, the priority command provides a minimum bandwidth guarantee.

In addition, the priority command implements a maximum bandwidth guarantee. Internally, the priority queue uses a token bucket that measures the offered load and ensures that the traffic stream conforms to the configured rate. Only traffic that conforms to the token bucket is guaranteed low latency.

The real benefit of the priority commandand its major difference from the bandwidth commandis how it provides a strict de-queueing priority to provide a bound on latency.