An administrator with ID392116981 is receiving complaints of pixilation smearing, and pulsing of video calls between two offices that are connected by a WAN. Assuming that QoS is implemented on the…

AF31 is typically used for transactional data or lower-priority multimedia streaming, not for interactive video conferencing where more stringent QoS is required.

CS3 (Class Selector 3) is a general class selector, often used for call signaling or lower-priority control traffic, but it does not provide the specific assurances needed for interactive video quality.

EF (Expedited Forwarding) is reserved for real-time voice traffic, as it provides the lowest latency and jitter, and should not be used for video traffic to avoid starving voice traffic.

Cisco's QoS baseline recommends marking interactive video (video conferencing) traffic with DSCP AF41 (Assured Forwarding Class 4, low drop precedence). This ensures video traffic receives priority over less critical traffic and less priority than voice (EF), with a focus on consistent bandwidth and lower loss.