Based on the Cisco Catalyst 2950 Series switch configuration shown, with no weights being assigned to the egress queues, which type of queuing is being implemented?

wrr-queue cos-map 1 0
wrr-queue cos-map 2 1 2 3
wrr-queue cos-map 3 4 5
wrr-queue cos-map 4 6 7

A.
weighted round robin

B.
priority

C.
custom

D.
weighted fair

E.
weighted round robin with an expedite queue

F.
modified deficit round robin

Explanation:

wrr-queue cos-map
To map CoS values to drop thresholds for a queue, use the wrr-queue cos-map command. Use the no form of this command to return to the default settings.
wrr-queue cos-map queue-id threshold-id cos-1 … cos-n
no wrr-queue cos-map