The answer is to set the proposal list with AES256-GCM and SHA256 as the first entry in both the phase1 and phase2 configuration. This is correct because IKEv2 enforces proposal order strictly: the initiator sends its list of proposals in the order they are configured, and the responder selects the first matching proposal from that list. By placing your desired cipher and hash combination first, you force the tunnel to negotiate that exact suite before any fallback options are considered. On the Fortinet NSE 7 Advanced Security NSE7 exam, this concept tests your understanding of IKEv2 negotiation behavior versus IKEv1, where proposal order is often ignored or treated as a simple list of acceptable options. A common trap is assuming that all proposals are equally preferred or that the responder can override the order, but in IKEv2, the initiator’s sequence is authoritative. Memory tip: think of IKEv2 proposals like a restaurant menu—the first item listed is the chef’s recommendation, and the kitchen will serve that unless it’s unavailable.
NSE7 Advanced VPN and Zero Trust Practice Question
This NSE7 practice question tests your understanding of advanced vpn and zero trust. 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 administrator is configuring a site-to-site IPsec VPN with IKEv2. The remote peer supports multiple proposals. The administrator wants to ensure that the VPN tunnel uses AES256-GCM for encryption and SHA256 for integrity. Which configuration setting should be used to enforce this preference?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set the 'proposal' list with AES256-GCM and SHA256 as the first entry
In IKEv2, the proposal order determines the preference. The first matching proposal is used. To enforce AES256-GCM and SHA256, the administrator should set those as the first proposal in the phase1 and phase2 configuration.
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.
✓
Set the 'proposal' list with AES256-GCM and SHA256 as the first entry
Why this is correct
The order of proposals defines priority; the first matching proposal is selected. Placing AES256-GCM/SHA256 first ensures it is preferred.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable 'set proposal-mode strict'
Why it's wrong here
There is no 'proposal-mode' setting in FortiOS; the order is the only priority mechanism.
✗
Use IKEv2 rekey to change the proposal after initial handshake
Why it's wrong here
Rekey uses the same proposals as the initial negotiation; it cannot change the algorithm selection method.
✗
Configure a phase2 selectors with the exact traffic of interest
Why it's wrong here
Phase2 selectors define the traffic to be encrypted, not the encryption algorithm.
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 VPN and Zero Trust — This question tests Advanced VPN and Zero Trust — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set the 'proposal' list with AES256-GCM and SHA256 as the first entry — In IKEv2, the proposal order determines the preference. The first matching proposal is used. To enforce AES256-GCM and SHA256, the administrator should set those as the first proposal in the phase1 and phase2 configuration.
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.
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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