What is the function of class-based marking?
A. Marking packets is based only on CoS value, IP precedence value or DSCP value allows Layer 3frames to be identified and distinguished from other packets.
B. Marking frames based only on CoS value or IP precedence value allows Layer 2 frames to be identifiedand distinguished from other frames.
C. Marking frames or packets sets information in the Layer 2 and Layer 3 headers of a packet so that theframe or packet can be identified and distinguished from other frames or packets in the same trafficflow.
D. Marking frames only sets information in the Layer 2 headers of a frame so that the frame can beidentified and distinguished from other packets or frames.
E. Marking allows network devices to classify a packet or frame, based on a specific traffic descriptor.
