A user can divide network traffic into which of the following classes of service? Each correct answer represents a complete solution. Choose three.

A.
Video payload

B.
Voice and video payload

C.
Voice payload

D.
Voice and video signal traffic

Explanation:
A user can divide network traffic into the following three classes of service:
Voice payload: Voice calls are a major part of network traffic, so a network traffic is mainly divided in this class.
Video payload: Video traffic has variable packet rates and slightly variable bit rates, so this class is used to separate the video traffic.
Voice and video signal traffic: This traffic is treated as a data application in QoS. In this class, protocols are used to tolerate jitter and delay.

Answer option B is incorrect. It is not a valid option.