The answer is that the FortiGuard service must be enabled and a signature update schedule configured. This is correct because automatic IPS signature updates rely on the FortiGate’s ability to connect to FortiGuard distribution servers, which requires the service to be active; without a defined schedule, the device will only check for updates when an administrator triggers a manual pull, defeating the purpose of automation. On the Fortinet NSE 4 Network Security Professional NSE4 exam, this concept tests your understanding of how IPS update policies differ from manual or on-demand updates, and a common trap is assuming that enabling the FortiGuard service alone is sufficient—candidates often overlook the need for a schedule. To remember, think of it as a two-step lock: the service is the key to the door, but the schedule is the timer that opens it automatically.
NSE4 Security Profiles Practice Question
This NSE4 practice question tests your understanding of security profiles. 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 needs to ensure that IPS signatures are updated automatically on the FortiGate. Which configuration should be verified?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The FortiGuard service is enabled and the signature update schedule is configured.
Option D is correct because automatic IPS signature updates require the FortiGuard service to be enabled and a signature update schedule to be configured. Without a schedule, updates occur only manually; without the service enabled, the FortiGate cannot connect to FortiGuard distribution servers to retrieve new signatures.
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 IPS engine is upgraded to the latest version.
Why it's wrong here
Engine updates are separate from signature updates.
✗
The intrusion prevention profile is applied to the firewall policy.
Why it's wrong here
This applies signatures but does not update them.
✗
The application control profile is set to 'monitor' for all applications.
The FortiGuard service is enabled and the signature update schedule is configured.
Why this is correct
Automatic updates require FortiGuard service enabled and schedule set.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is confusing IPS signature updates with IPS engine updates or profile application, leading candidates to select options that affect detection or inspection rather than the update mechanism itself.
Detailed technical explanation
How to think about this question
FortiGate uses the FortiGuard service to connect to FortiGuard Distribution Servers (FDS) over HTTPS (port 443) or UDP (port 8888) to download IPS signatures. The update schedule can be set to 'every minute', 'every hour', or a custom schedule via 'config system autoupdate schedule'. If the FortiGate is behind a proxy, additional proxy settings must be configured under 'config system fortiguard' to allow updates to succeed.
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.
TExam Day Tips
→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 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.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security Profiles — This question tests Security Profiles — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The FortiGuard service is enabled and the signature update schedule is configured. — Option D is correct because automatic IPS signature updates require the FortiGuard service to be enabled and a signature update schedule to be configured. Without a schedule, updates occur only manually; without the service enabled, the FortiGate cannot connect to FortiGuard distribution servers to retrieve new signatures.
What should I do if I get this NSE4 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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