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Palo Alto Networks SD-WAN-Engineer Exam - Topic 3 Question 6 Discussion

Actual exam question for Palo Alto Networks's SD-WAN-Engineer exam
Question #: 6
Topic #: 3
[All SD-WAN-Engineer Questions]

What is the number and structure of Prisma SD-WAN QoS queues supported per WAN interface?

Show Suggested Answer Hide Answer
Suggested Answer: B

Comprehensive and Detailed Explanation

The Prisma SD-WAN (ION) QoS engine utilizes a hierarchical queuing structure designed to provide granular control over application performance. Each WAN interface on an ION device supports a total of 16 QoS queues.

This 16-queue structure is derived from a matrix of 4 Classes (often referred to as Priority Classes) multiplied by 4 Application Criteria (Traffic Types).2

4 Priority Classes: The system defines four high-level business priority categories:3

Platinum (Highest priority)4

Gold

Silver

Bronze (Lowest priority/Best Effort)5

4 Application Criteria (Sub-queues): Within each of the four priority classes, the system further categorizes traffic into four specific application types to ensure proper handling (e.g., ensuring voice doesn't get stuck behind bulk data even within the same priority level):6

Real-Time Video

Real-Time Audio

Transactional

Bulk7

Calculation: 4 Priority Classes 4 Application Types = 16 Total Queues per interface. This structure allows the scheduler to ensure that a 'Platinum' voice call is prioritized over 'Platinum' bulk data, and both are prioritized over 'Gold' traffic.


by Alesia at Jan 05, 2026, 05:16 AM

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Louis
3 days ago
Definitely A) - I've seen it in action.
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Barbra
9 days ago
Wait, only 8 queues? That seems low!
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Carla
14 days ago
I think B) is the right answer, 16 queues sounds better.
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Bernadine
19 days ago
A) 12 queues, 4 classes, 3 criteria each!
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Ahmed
24 days ago
Haha, I bet the exam writers are just trying to trick us. I'm going with C, but I'm keeping my fingers crossed for a surprise bonus question on Prisma SD-WAN dance moves.
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Hannah
29 days ago
I'm torn between A and B, but I think I'll go with B. Sixteen queues just sounds more robust and capable of handling complex QoS requirements.
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Lisbeth
2 months ago
I'm going with D. Eight queues with two classes and four application criteria per class. Seems like a good balance of flexibility and simplicity.
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Brinda
2 months ago
C seems like the most straightforward option. Eight queues with one priority queue and seven non-priority queues. Simple and to the point.
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Frank
2 months ago
Hmm, I think the answer is B. Sixteen queues with four classes and four application criteria per class sounds about right.
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Van
2 months ago
I remember there being 4 application criteria, but I can't remember if it was 8 queues or 12. This is tricky!
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Louisa
2 months ago
I’m a bit confused; I thought there were only 8 queues total, but I can’t recall the specifics about the classes.
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Johnetta
3 months ago
I practiced a similar question, and I feel like the answer was 16 queues with 4 classes. That sounds right, doesn’t it?
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Ines
3 months ago
I think I remember something about 12 queues, but I’m not entirely sure about the classes and application criteria.
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Kaitlyn
3 months ago
I'm not sure about this one. I'll try to eliminate the options that don't seem to match the question and then make an educated guess.
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Laurena
3 months ago
This seems straightforward. I'm pretty confident option D is the correct answer based on the details provided.
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Bev
3 months ago
Okay, I remember learning about the Prisma SD-WAN QoS queues in class. I think option B sounds right, but I'll double-check my notes.
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Allene
3 months ago
Hmm, I'm a bit confused by the different queue structures. I'll need to review the Prisma SD-WAN documentation again.
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Jules
4 months ago
I think I've seen this type of question before. Let me think through the options carefully.
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