Quick Answer
The answer is traffic logs. Traffic logs are the correct FortiAnalyzer log type to query because they record every session that passes through the firewall, including both allowed and denied traffic, and crucially contain the policy ID that permitted the flow along with source, destination, and action details. For the Fortinet NSE 7 Advanced Security NSE7 exam, this question tests your understanding of log categorization and incident investigation workflows—a common trap is confusing event logs (which record system changes) or security logs (which focus on threats) with the session-level detail only traffic logs provide. When investigating a past malicious flow, remember that traffic logs are the definitive source for mapping a session back to the specific firewall policy that allowed it. A helpful memory tip: think of traffic logs as the “who, what, and where” of every connection, while other logs tell you “why” something happened.
This NSE7 practice question tests your understanding of troubleshooting and diagnostics. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 investigating a security incident and needs to determine which firewall policy allowed a specific malicious traffic flow. The traffic is no longer active. Which FortiAnalyzer log type should the admin query?
Event logs
Why wrong: Event logs record system events, not per-session traffic details.
Security logs
Why wrong: Security logs record intrusion prevention or web filtering events, not policy mapping for traffic.
Traffic logs
Traffic logs contain policy ID and action for each session, perfect for this investigation.
Audit logs
Why wrong: Audit logs track admin configuration changes, not traffic flows.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Traffic logs
Traffic logs record all allowed/denied sessions, including source/destination, policy ID, and action, making them ideal for identifying which policy allowed a flow.
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
For each option: why learners choose it and why it is or isn't the right answer here.
Event logs
Why it's wrong here
Event logs record system events, not per-session traffic details.
Security logs
Why it's wrong here
Security logs record intrusion prevention or web filtering events, not policy mapping for traffic.
Traffic logs
Why this is correct
Traffic logs contain policy ID and action for each session, perfect for this investigation.
Related concept
Static NAT maps one inside address to one outside address.
Audit logs
Why it's wrong here
Audit logs track admin configuration changes, not traffic flows.
Common exam traps
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.
Detailed technical explanation
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.
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
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
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.
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FAQ
Troubleshooting and Diagnostics — This question tests Troubleshooting and Diagnostics — Static NAT maps one inside address to one outside address..
The correct answer is: Traffic logs — Traffic logs record all allowed/denied sessions, including source/destination, policy ID, and action, making them ideal for identifying which policy allowed a flow.
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.
Static NAT maps one inside address to one outside address.
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Last reviewed: Jun 21, 2026
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