How do you prioritize traffic using QoS in a mixed video and VoIP network?

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How do you prioritize traffic using QoS in a mixed video and VoIP network?

Asked on Jan 14, 2026

Answer

In a mixed video and VoIP network, Quality of Service (QoS) is crucial to ensure that latency-sensitive traffic like voice and video is prioritized over less time-sensitive data. This can be achieved by configuring QoS policies on network devices such as routers and switches to classify and prioritize traffic based on its type and requirements.

Example Concept: QoS in a mixed video and VoIP network involves using techniques such as traffic classification, marking, and queuing. Traffic is classified into different categories (e.g., voice, video, data) and marked using Differentiated Services Code Point (DSCP) values. Priority queuing mechanisms, such as Low Latency Queuing (LLQ), ensure that voice packets are transmitted first, followed by video, while other data types are queued based on their priority levels. This approach minimizes jitter and latency for voice and video traffic, maintaining high-quality communication.

Additional Comment:

Use DSCP values to mark packets; EF (Expedited Forwarding) for voice and AF (Assured Forwarding) for video.
Implement LLQ to ensure voice traffic is prioritized in the queue.
Configure bandwidth reservation to guarantee sufficient resources for voice and video streams.
Monitor and adjust QoS policies to adapt to network changes and traffic patterns.
Ensure end-to-end QoS configuration across the entire network path.

✅ Answered with Networking best practices.

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