Which QoS prioritization method is appropriate for interactive voice and video traffic?

Low-latency queuing (LLQ) is the most appropriate QoS prioritization method for interactive voice and video traffic. LLQ combines the benefits of priority queuing (PQ) and class-based weighted fair queuing (CBWFQ). It allows you to define a strict priority queue for delay-sensitive traffic like voice, ensuring that this traffic is always serviced first, minimizing latency and jitter. Other traffic types can then be handled by CBWFQ, receiving guaranteed bandwidth. Traffic policing is a mechanism to limit the input or output rate of a traffic class, dropping or remarking packets that exceed the configured rate, which doesn't prioritize real-time traffic for low latency. Round-robin scheduling processes queues in a cyclical fashion, which doesn't guarantee immediate service for time-sensitive data. Expedited Forwarding (EF) is a Per-Hop Behavior (PHB) defined in DiffServ, which marks traffic for preferential treatment but doesn't specify the queuing mechanism itself; LLQ is a common implementation that provides EF-like behavior.