350-501 Automation and Quality of Services Practice Question
An SP engineer is designing a QoS policy for a business customer with three traffic classes: Voice (critical latency), Transactional Data (low delay), and Bulk Data (no strict requirements). The link is 100 Mbps. Which TWO actions should be part of the policy? (Select two.)
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
✓
Apply LLQ to the voice class with a policer to limit its rate to 10 Mbps.
LLQ provides strict priority for voice. CBWFQ with bandwidth guarantees for transactional data ensures it gets capacity. Bulk data can use remaining 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.
- ✗
Use FIFO queuing for the bulk data class.
Why it's wrong here
FIFO may not be optimal, but it's not a design choice here.
- ✓
Apply LLQ to the voice class with a policer to limit its rate to 10 Mbps.
Why this is correct
LLQ ensures low latency; policing prevents voice from starving other classes.
- ✗
Use WRED on the voice class for congestion avoidance.
Why it's wrong here
WRED should not be applied to voice as it can cause drops.
- ✗
Set the queue limit to 1000 packets for all classes.
Why it's wrong here
Queue limits are not the primary mechanism; shaping/policing are more relevant.
- ✓
Apply CBWFQ to the transactional data class with a bandwidth of 30 Mbps.
Why this is correct
CBWFQ guarantees bandwidth for transactional data.
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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.