350-501 Automation and Quality of Services Practice Question
An SP network engineer is reviewing a QoS configuration on a PE router. The policy-map uses a class for voice with the 'priority' command, and a class for video with 'bandwidth remaining percent 30'. What is the purpose of the 'bandwidth remaining percent' command?
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
✓
It allocates a percentage of the bandwidth left after priority queues are served.
'bandwidth remaining percent' allocates a percentage of the remaining bandwidth after the priority queue is serviced. This ensures other classes share leftover bandwidth.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It sets the maximum bandwidth for the class.
Why it's wrong here
This is achieved by policing or shaping.
- ✓
It allocates a percentage of the bandwidth left after priority queues are served.
Why this is correct
Exactly; it distributes unused bandwidth among non-priority classes.
- ✗
It guarantees a minimum bandwidth for the class.
Why it's wrong here
'bandwidth remaining percent' does not guarantee a minimum; it allocates leftover bandwidth.
- ✗
It enables Weighted Random Early Detection on the class.
Why it's wrong here
WRED is a congestion avoidance mechanism, not bandwidth allocation.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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