NSE7 Advanced Networking and SD-WAN Practice Question
An administrator is configuring an SD-WAN rule to route VoIP traffic over the most reliable link. The performance SLA monitors latency, jitter, and packet loss. The administrator wants the rule to select the member with the lowest jitter that also meets the SLA thresholds. Which SD-WAN strategy should be used?
⚠ Common exam trap
The trap here is assuming that lowest-latency (SLA) is sufficient for VoIP, when jitter is the specific metric that most affects voice quality.
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
✓
lowest-jitter (SLA)
For VoIP, jitter is a critical metric. The lowest-jitter (SLA) strategy chooses the member with the lowest jitter among those passing the SLA. Other strategies focus on cost, bandwidth, or latency, which do not directly address the need for minimal jitter.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
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maximize-bandwidth (SLA)
Why it's wrong here
Maximize-bandwidth (SLA) distributes traffic across all SLA-compliant members proportionally to their available bandwidth. It is designed for throughput, not for selecting a single link with the lowest jitter. For VoIP, which requires consistent low jitter, this strategy may spread traffic across multiple links, potentially causing jitter variation.
- ✓
lowest-jitter (SLA)
Why this is correct
The lowest-jitter (SLA) strategy selects the member with the lowest jitter that also meets the SLA thresholds. This directly matches the requirement to route VoIP traffic over the link with the least jitter, ensuring high call quality. It is specifically designed for real-time traffic where jitter is critical.
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lowest-latency (SLA)
Why it's wrong here
Lowest-latency (SLA) selects the member with the lowest latency among those that meet the SLA. While latency is important for VoIP, the requirement specifically mentions lowest jitter. This strategy does not prioritize jitter, so it may not select the optimal link for jitter-sensitive traffic like VoIP.
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lowest-cost (SLA)
Why it's wrong here
The lowest-cost (SLA) strategy selects the member with the lowest cost, as defined by the link-cost attribute, among those that meet the SLA. It does not consider jitter directly; cost is an administrative metric. While it can be used for VoIP if cost is assigned based on link quality, it does not dynamically select based on the lowest jitter value.
Visual reference
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 September 2026 · checked against the official Fortinet exam blueprint
This NSE7 practice question is part of Courseiva's free Fortinet 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 NSE7 exam.