350-501 Automation and Quality of Services Practice Question
An SP is designing a QoS policy for a customer VPN that carries voice, video conferencing, and bulk data. The voice traffic requires low latency, video conferencing requires assured bandwidth, and bulk data should use any remaining bandwidth. Which queuing strategy should be applied on the PE-CE link?
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 with CBWFQ
LLQ provides a strict priority queue for voice (low latency) and CBWFQ for other classes with bandwidth guarantees. Video conferencing can be assigned to a class with a bandwidth percent, and bulk data to the default class with fair queuing.
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 with CBWFQ
Why this is correct
LLQ provides strict priority for voice, and CBWFQ allows bandwidth guarantees for video and bulk data.
- ✗
Policing with drop probability
Why it's wrong here
Policing is a traffic conditioner, not a queuing strategy.
- ✗
FIFO with WRED
Why it's wrong here
FIFO does not provide class-based differentiation or priority.
- ✗
CBWFQ only
Why it's wrong here
CBWFQ lacks a strict priority queue, which is needed for voice.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.