The answer is that the IKE SA was created only 1 second ago because the VPN tunnel was just configured or a configuration change was applied. This occurs because any modification to the VPN settings—such as changing pre-shared keys, phase 1 parameters, or interface IPs—triggers a teardown of the existing IKE SA and immediate renegotiation, resetting the “created” timer to zero. On the Fortinet NSE 7 Advanced Security exam, this question tests your ability to interpret the `diagnose vpn ike gateway list` output and distinguish between a fresh SA from a recent change versus one that has simply been idle. A common trap is assuming the “1s ago” indicates a transient network issue, but the key clue is the “state: UP” status, which confirms successful re-establishment after a deliberate restart. Remember the memory tip: “Change the config, reset the clock”—any configuration change or IKE restart will always show a newly created SA timestamp.
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.
An administrator runs the following CLI command on a FortiGate and sees the output below:
diagnose vpn ike gateway list
vd: root/0 name: REMOTE_GW vrf: 0 version: 2
state: UP IKE SA: created 1s ago 1.2.3.4:500->5.6.7.8:500
What is the most likely explanation for the IKE SA being created only 1 second ago?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
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 VPN tunnel was just configured or a configuration change was applied
The IKE SA was recently created, suggesting a previous SA was deleted and a new one established. This often happens after configuration changes or a restart of IKE negotiation.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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 remote peer changed its IP address
Why it's wrong here
A new IP would cause a new SA, but the output shows same IPs.
✗
DPD detected a dead peer and renegotiated
Why it's wrong here
DPD would delete and re-establish, but the timestamp is too recent for a typical DPD interval.
✗
The phase 2 SA expired and triggered phase 1 rekey
Why it's wrong here
Phase 2 expiry may trigger rekey but phase 1 SA would remain; this shows a new phase 1 SA.
✓
The VPN tunnel was just configured or a configuration change was applied
Why this is correct
Recent creation time indicates the SA was just negotiated, typical after applying config changes or restarting IKE.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Static NAT maps one inside address to one outside address.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Trap categories for this question
Command / output trap
A new IP would cause a new SA, but the output shows same IPs.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
Static NAT maps one inside address to one outside address.
PAT allows many inside hosts to share one public address using ports.
Inside local and inside global describe the private and translated addresses.
NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
→Identify inside and outside interfaces first.
→Check whether the scenario needs static NAT, dynamic NAT or PAT.
→Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related NSE7 NAT questions on configuration and troubleshooting.
Advanced VPN and Zero Trust — This question tests Advanced VPN and Zero Trust — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: The VPN tunnel was just configured or a configuration change was applied — The IKE SA was recently created, suggesting a previous SA was deleted and a new one established. This often happens after configuration changes or a restart of IKE negotiation.
What should I do if I get this NSE7 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related NSE7 NAT questions on configuration and troubleshooting.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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