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

AF41 (Assured Forwarding Class 4, low drop probability) is a high-priority DSCP marking. Marking video traffic with AF41 ensures it receives preferential treatment in network queues and avoids congestion, thus prioritizing video delivery over less critical high-priority traffic classes (e.g., AF31).

The statement 'to give video calls a higher priority than AP41' is nonsensical, as AF41 is a specific priority level and cannot be given higher priority than itself; the correct context is comparing it to other traffic classes.

Marking with AF41 helps in delivering video quality but does not inherently allow high-definition quality calls over low-speed links; codecs and link capacity are the primary factors for that, while QoS improves delivery under existing conditions.

Marking both the audio and video components of a single video call with the same DSCP value (AF41) helps ensure they experience similar queuing and forwarding delays across the network. This consistent treatment is crucial for maintaining proper lip synchronization, where the audio and video remain aligned.

While AF41 is used for video, voice calls typically use Expedited Forwarding (EF) for the highest priority and lowest latency, meaning AF41 is generally not used to provide separate classes for audio-only calls and video calls.