The answer is to configure a hysteresis value for the SLA. Hysteresis introduces a buffer or deadband around the latency threshold, preventing the SD-WAN from switching traffic between wan1 and wan2 due to minor, transient latency fluctuations that still fall within acceptable limits. Without hysteresis, the performance SLA triggers a link change the moment latency crosses the threshold, even briefly, causing unnecessary flapping. On the Fortinet NSE 7 Advanced Security NSE7 exam, this concept tests your understanding of how to stabilize SD-WAN path selection under the 'Best Quality' strategy, where the metric (latency) is sensitive to jitter. A common trap is to assume increasing the SLA probe interval or adding more members will solve flapping, but only hysteresis directly dampens oscillation. Memory tip: think of hysteresis as a "no-fly zone" around your threshold—traffic won't switch until the metric clearly leaves that zone, not just touches its edge.
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.
An administrator configures SD-WAN with two members (wan1, wan2) and a performance SLA for ICMP to 1.1.1.1. The SD-WAN rule is set to 'Best Quality' with 'latency' metric. The admin notices that traffic sometimes switches to the other link even when the current link has acceptable latency. Which action can reduce unnecessary flapping?
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.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure a hysteresis value for the SLA
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
Configure a hysteresis value for the SLA
Why this is correct
Hysteresis adds a buffer: the link must be significantly better before switching, reducing flapping.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the SLA probe interval
Why it's wrong here
Increasing interval would make detection slower but not prevent flapping due to minor fluctuations.
✗
Use 'manual' strategy instead
Why it's wrong here
Manual strategy would not automatically switch, but it defeats the purpose.
✗
Increase the 'update-cascade-interface' setting
Why it's wrong here
This setting is for updating routes, not for flapping prevention.
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: Configure a hysteresis value for the SLA
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". 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.
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Question Discussion
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