The answer is that the tunnel will be brought down after 3 unanswered DPD probes, each 10 seconds apart. This is because the DPD retry count of 3 and retry interval of 10 seconds mean the FortiGate sends a Dead Peer Detection probe every 10 seconds; if all three consecutive probes go unanswered, the peer is declared dead and the tunnel is torn down—totaling 30 seconds of silence before failure. On the Fortinet NSE 7 Advanced Security NSE7 exam, this tests your ability to interpret the `diagnose vpn ike gateway list` output, where a common trap is confusing the retry interval with the total timeout. Remember, the total detection time is retry count multiplied by retry interval, not just the interval alone. A quick memory tip: “Three strikes, ten seconds apart—peer is out of the park.”
NSE7 Advanced VPN and Zero Trust Practice Question
This NSE7 practice question tests your understanding of advanced vpn and zero trust. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is troubleshooting an IPsec VPN tunnel that connects a branch office to the main office. The tunnel is down. The administrator runs 'diagnose vpn ike gateway list' and sees the following output:
IKE gateway: branch
state: down
DPD: enabled
DPD retrycount: 3
DPD retryinterval: 10
What does the DPD configuration indicate?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The tunnel will be brought down after 3 unanswered DPD probes, each 10 seconds apart
DPD (Dead Peer Detection) is configured with a retry count of 3 and a retry interval of 10 seconds. This means the FortiGate will send DPD probes every 10 seconds and after 3 consecutive failures (30 seconds total without response), it will consider the peer dead. The tunnel is currently down, likely because DPD detected the peer as unreachable.
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.
✗
The tunnel will be brought down immediately after the first DPD timeout
Why it's wrong here
It requires 3 consecutive failures.
✗
The tunnel will stay up indefinitely because DPD is disabled
Why it's wrong here
DPD is enabled as shown.
✓
The tunnel will be brought down after 3 unanswered DPD probes, each 10 seconds apart
Why this is correct
This is the correct interpretation of the DPD retrycount and retryinterval.
Related concept
Read the scenario before looking for a memorised answer.
✗
DPD will send probes every 30 seconds
Why it's wrong here
The retryinterval is 10 seconds, not 30.
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.
Trap categories for this question
Command / output trap
DPD is enabled as shown.
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: The tunnel will be brought down after 3 unanswered DPD probes, each 10 seconds apart — DPD (Dead Peer Detection) is configured with a retry count of 3 and a retry interval of 10 seconds. This means the FortiGate will send DPD probes every 10 seconds and after 3 consecutive failures (30 seconds total without response), it will consider the peer dead. The tunnel is currently down, likely because DPD detected the peer as unreachable.
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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