SD-WAN-Engineer Planning And Design Practice Question
You need to ensure that branch office voice traffic always has the lowest latency. Which QoS classification strategy is recommended?
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
✓
DSCP Marking and Queueing
Prioritizing voice (EF class) in the QoS policy ensures it gets priority access to the transport queue.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Flow Control
Why it's wrong here
Flow control manages buffer congestion, not voice prioritization.
- ✗
Bandwidth Reservation
Why it's wrong here
Reservation is insufficient without strict priority queuing.
- ✓
DSCP Marking and Queueing
Why this is correct
DSCP-based classification and strict priority queuing are best for voice.
- ✗
Rate Limiting
Why it's wrong here
Rate limiting is for capping traffic, not prioritizing voice.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Palo Alto Networks exam blueprint
This SD-WAN-Engineer practice question is part of Courseiva's free Palo Alto Networks 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 SD-WAN-Engineer exam.