Palo Alto Networks SD-WAN-Engineer Exam - Topic 4 Question 7 Discussion

Actual exam question for Palo Alto Networks's SD-WAN-Engineer exam

Question #: 7
Topic #: 4

When defining a Path Quality Profile (SLA) for a "Transactional" application group (e.g., Citrix, Oracle), the administrator sets the "Packet Loss" threshold to 1%.

What happens to the traffic for this application if all active paths currently exceed this 1% loss threshold?

BThe system selects the best available path (lowest loss) among the active paths, even if it violates the profile.

DThe system automatically enables a Backup path, even if the Active paths are technically 'Up' but degraded.

CThe traffic is queued indefinitely until a path recovers.

AThe traffic is dropped to prevent data corruption.

Show Suggested Answer

Suggested Answer: B

Comprehensive and Detailed Explanation

This behavior describes the 'Best Available Path' logic inherent in Prisma SD-WAN's availability design.

SLA Thresholds: Path Quality Profiles act as filters to identify compliant paths.

Total Violation: If all configured 'Active' paths violate the SLA (e.g., Path A has 2% loss, Path B has 5% loss, and the threshold is 1%), the system does not drop the traffic (Option A) because maintaining connectivity is prioritized over perfect quality.

Selection Logic: The system enters a fallback state where it compares the available active paths and selects the 'Least Bad' one---the path that is closest to meeting the SLA (in this case, Path A with 2% loss).

Backup Paths: Traffic would only move to a Backup path (Option D) if the policy explicitly configures the backup path to engage upon SLA violation of the active set. However, strictly speaking, if only active paths are considered and all fail, it picks the best of the active group rather than blackholing the traffic.

by Dong at Jan 25, 2026, 06:27 AM

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Brianne

3 days ago

This is why you always need to have a contingency plan for your SLAs. Murphy's Law, you know?

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Ozell

9 days ago

I hope the admin has a backup plan in case there are no paths that meet the 1% loss requirement.

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Josue

14 days ago

If all paths exceed the 1% loss, the application will probably start experiencing performance issues.

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Christene

19 days ago

The traffic will be rerouted to an alternative path that meets the 1% loss threshold.

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Bulah

24 days ago

I believe the traffic would be impacted significantly, possibly leading to degraded performance, but I need to double-check how that interacts with the SLA settings we discussed.

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Maile

29 days ago

I’m a bit confused about the specifics. Does the application just slow down, or does it completely stop working if the loss is too high?

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Sylvie

2 months ago

I remember something about how exceeding the threshold could trigger alerts or even failover to backup paths, similar to what we practiced in the lab.

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Mari

2 months ago

I think if the packet loss exceeds 1%, the traffic might get dropped or rerouted, but I'm not entirely sure how that affects the overall performance.

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Lyla

2 months ago

Hmm, I'm a bit stumped on this one. I know the 1% loss threshold is part of the SLA, but I'm not sure exactly what happens to the traffic in this scenario. Time to review my notes on managing application performance.

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Jenifer

2 months ago

This feels like it's testing our knowledge of how application traffic is managed when quality thresholds are exceeded. I'll need to draw on my understanding of network service level agreements and application failover mechanisms.

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Louann

2 months ago

I think the key is understanding how the application handles paths that exceed the defined threshold. Does it try to find an alternate path, or does it just let the traffic through even though it's above the limit?

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Raelene

3 months ago

Okay, so if all the active paths are exceeding the 1% loss threshold, does that mean the traffic will get dropped or rerouted somehow? I'm a bit unsure about the specifics here.

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Gilma

3 months ago

Hmm, this seems like a tricky one. I'll need to think through the implications of the packet loss threshold for the application traffic.

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