The answer is that the best quality strategy selects the member with the best SLA metric, and when both members satisfy the SLA, wan1 is chosen by default as the preferred link. This occurs because the best quality algorithm does not load balance; it strictly evaluates the performance SLA metrics and, in a tie, defaults to the first member in the SD-WAN configuration list or the one with the lowest cost. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding of how SD-WAN traffic imbalance can arise even when all links meet SLA thresholds, a common trap where candidates assume "best quality" implies automatic load sharing. The key insight is that best quality is a deterministic, metric-driven path selection, not a load-balancing strategy. Memory tip: think of "best quality" as a beauty contest—if two contestants are equally qualified, the judge picks the first one in line, not both.
NSE7 Advanced Networking and SD-WAN Practice Question
This NSE7 practice question tests your understanding of advanced networking and sd-wan. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A FortiGate has an SD-WAN configuration with two members (wan1, wan2). The performance SLA monitors latency to 8.8.8.8. The admin notices that even when the SLA is satisfied on both members, all traffic uses wan1. The SD-WAN rule is configured with 'strategy = best quality'. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The best quality strategy selects the member with the best SLA metric, which is wan1 by default when both meet SLA
Option A is correct. In best quality mode, traffic uses the member with the best SLA metric. If both satisfy SLA, the default preference is the member with the lowest cost or the first member in the list (wan1). To load balance, the admin should use a different strategy or enable 'update-static-route' to adjust routing metrics.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
A firewall policy is overriding the SD-WAN rule
Why it's wrong here
Firewall policies do not override SD-WAN rules; SD-WAN rules determine interface selection.
✓
The best quality strategy selects the member with the best SLA metric, which is wan1 by default when both meet SLA
Why this is correct
Best quality uses a tie-breaking order; it does not load balance equally.
Clue confirmation
The clue words "best", "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The performance SLA is incorrectly configured, causing wan2 to be ignored
Why it's wrong here
If both meet SLA, both are candidates; wan1 is chosen due to ordering.
✗
The SD-WAN rule has 'set match-vip disable' which forces all traffic to wan1
Why it's wrong here
Match-vip is for matching destination VIPs, not for selecting members.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the NSE7 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
What to study next
Got this wrong? Here's your next step.
Identify which NSE7 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Advanced Networking and SD-WAN — This question tests Advanced Networking and SD-WAN — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The best quality strategy selects the member with the best SLA metric, which is wan1 by default when both meet SLA — Option A is correct. In best quality mode, traffic uses the member with the best SLA metric. If both satisfy SLA, the default preference is the member with the lowest cost or the first member in the list (wan1). To load balance, the admin should use a different strategy or enable 'update-static-route' to adjust routing metrics.
What should I do if I get this NSE7 question wrong?
Identify which NSE7 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Are there clue words in this question I should notice?
Yes — watch for: "best", "most likely". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A FortiGate with SD-WAN configured has a Performance SLA monitoring Google DNS (8.8.8.8). The SLA is configured with latency threshold 100 ms and jitter threshold 20 ms. The link is currently meeting both thresholds. The administrator wants to ensure that if the SLA fails, traffic moves to another link. Which SD-WAN rule strategy should be used?
medium
A.Best quality
B.Manual selection
C.Maximize bandwidth (SLA)
✓ D.Failover (SLA)
Last reviewed: Jun 21, 2026
Question Discussion
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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.
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