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Question :-

A network architect has created a quality of service (QoS) for an HP 5900 Series switch that uses four traffic classes. Class of Service (CoS) 5 for voice traffic. CoS 4 for Video traffic. And CoS 0 for everything else. The switch ports implement strict priority (SP) queuing. What would be an advantage of enabling weighted fair queuing (WFQ) instead of SP?
When congestion occurs, the port will randomly drop traffic in the CoS 3 and CoS 0 queues, preventing TCP synchronization that increase congestion
The architect can ensure that voice traffic is always forwarded before bandwidth intensive video traffic
The architect can guarantee specific bandwidth to each class but prevent video an SAP applications from starving out other applications entirely
When congestion occurs, the port will buffer traffic in lower priority queues rather than drop it immediately as it does with SP queuing

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