350-501 Automation and Quality of Services Practice Question
An SP network operator needs to ensure that voice traffic always gets priority access to the output link. Which queuing mechanism is designed to provide a strict priority queue while preventing starvation of other queues?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
LLQ
LLQ provides a strict priority queue for EF traffic and includes a policer to limit the priority traffic rate, preventing starvation of other queues.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
LLQ
Why this is correct
LLQ combines a strict priority queue with policing to protect other classes.
- ✗
CBWFQ
Why it's wrong here
CBWFQ does not have a strict priority queue.
- ✗
FIFO
Why it's wrong here
FIFO is simple but does not prioritize.
- ✗
WRED
Why it's wrong here
WRED is a congestion avoidance mechanism, not queuing.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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