Correct answer & explanation
✓PQ: Strict priority queuing for delay-sensitive traffic
PQ gives strict priority to one queue, CBWFQ guarantees bandwidth to classes, LLQ combines strict priority with CBWFQ, WFQ provides fair queuing for flows, and CBWFQ is often used for data classes.
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Same concept, more angles
1 more way this is tested on 350-401
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Drag and drop each queuing mechanism on the left to its matching use case on the right.
medium- ✓ P1.PQ: Strict priority for delay-sensitive traffic
- ✓ P2.CBWFQ: Guaranteed bandwidth for defined classes
- ✓ P3.LLQ: Strict priority queue with CBWFQ for voice/video
- ✓ P4.WFQ: Fair queuing for all flows
- ✓ P5.CBWFQ: Bandwidth guarantee for data traffic
Why P1: PQ provides strict priority for delay-sensitive traffic, CBWFQ guarantees bandwidth for defined classes, LLQ combines strict priority with CBWFQ for real-time traffic, WFQ provides fair queuing for all flows, CBWFQ is used for data traffic requiring bandwidth guarantees.