Quick Answer
The answer is the Install Preview feature. This is correct because Install Preview generates a detailed diff of the exact CLI commands FortiManager will execute on the managed FortiGate, comparing the current running configuration against the intended policy package before any changes are committed. It specifically shows additions, deletions, and modifications to firewall policies, preventing the exact mismatch described where policies on the FortiGate do not match what was configured in FortiManager. On the Fortinet NSE 7 Advanced Security NSE7 exam, this question tests your understanding of pre-commit validation workflows and the distinction between Install Preview and a simple policy install or device configuration backup. A common trap is confusing Install Preview with the "Install Wizard" or "Device Manager" review, but only Install Preview shows the raw CLI diff. Memory tip: think "Preview = Pre-commit CLI diff" to remember it shows the exact commands before installation.
This NSE7 practice question tests your understanding of enterprise firewall and vdoms. 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 notices that after installing a new policy package from FortiManager, the firewall policies on the managed FortiGate do not match what was configured in FortiManager. What feature should the administrator use to review the exact changes before committing?
Revision history
Why wrong: Revision history shows past configurations but does not preview pending changes.
Device manager log
Why wrong: The log records past actions but does not preview pending changes.
Install preview
Install preview generates the CLI script that will be pushed to the device, allowing review.
Policy consistency check
Why wrong: This checks for inconsistencies between policy packages but does not provide a CLI preview.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Install preview
Option C, Install preview, is correct because it allows the administrator to review the exact configuration changes that FortiManager will push to the managed FortiGate before the changes are committed. This feature compares the current running configuration on the FortiGate with the intended policy package in FortiManager and displays a detailed diff of additions, deletions, and modifications. It is specifically designed to prevent unexpected policy mismatches by providing a pre-commit review step.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Revision history
Why it's wrong here
Revision history shows past configurations but does not preview pending changes.
Device manager log
Why it's wrong here
The log records past actions but does not preview pending changes.
Install preview
Why this is correct
Install preview generates the CLI script that will be pushed to the device, allowing review.
Related concept
Read the scenario before looking for a memorised answer.
Policy consistency check
Why it's wrong here
This checks for inconsistencies between policy packages but does not provide a CLI preview.
Common exam traps
The trap here is that candidates often confuse Revision history (which shows past snapshots) with the pre-commit review feature, but Revision history does not show the pending changes that will be applied in the next install operation.
Trap categories for this question
Command / output trap
Revision history shows past configurations but does not preview pending changes.
Detailed technical explanation
The Install preview feature works by generating a device-level configuration script that includes only the differences between the FortiManager policy package and the FortiGate's current running config. It uses the FortiManager-FortiGate protocol (FGFM) to retrieve the current configuration and compute a delta, which is then displayed in a human-readable format. In real-world scenarios, this is critical when multiple administrators modify policies simultaneously, as it prevents accidental overwrites or policy gaps that could lead to security breaches.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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FAQ
Enterprise Firewall and VDOMs — This question tests Enterprise Firewall and VDOMs — Read the scenario before looking for a memorised answer..
The correct answer is: Install preview — Option C, Install preview, is correct because it allows the administrator to review the exact configuration changes that FortiManager will push to the managed FortiGate before the changes are committed. This feature compares the current running configuration on the FortiGate with the intended policy package in FortiManager and displays a detailed diff of additions, deletions, and modifications. It is specifically designed to prevent unexpected policy mismatches by providing a pre-commit review step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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