What are two reasons that AF41 is marked for the audio and video channels of a video call?

What are two reasons that AF41 is marked for the audio and video channels of a video call? (Choose two.)
A. to prioritize video over other high -priority traffic classes
B. to give video calls a higher priority than AP41 in the QoS policy
C. to allow high-definition quality calls over low-speed links
D. to preserve lip synchronization between the audio and video channels
E. to provide separate classes for audio calls and video calls

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One thought on “What are two reasons that AF41 is marked for the audio and video channels of a video call?

  1. DE

    QoS Marking Differences Between Video Calls and Voice-Only Calls; A voice-only telephone call would have its media classified as CoS 5 (IP Precedence 5 or PHB EF), while the voice channel of a video conference would have its media classified as CoS 4 (IP Precedence 4 or PHB AF41). The audio and video channels of a video call both be marked as CoS 4 to (1) preserve lip-sync between audio and video channels and (2) provide separate classes for audio-only calls and video calls

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