20+ practice questions focused on Troubleshooting and Diagnostics — one of the most tested topics on the Fortinet NSE 7 Advanced Security NSE7 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start Troubleshooting and Diagnostics PracticeWhich TWO actions are appropriate when troubleshooting a slow network connection through a FortiGate?
Explanation: High CPU or memory utilization on a FortiGate can directly cause packet drops, queuing delays, and slow throughput, especially under load. Checking these resources is a fundamental first step in troubleshooting performance issues. Additionally, verifying the routing table ensures that traffic is being forwarded via the correct next-hop interfaces; incorrect routing can lead to suboptimal paths or blackholing, resulting in perceived slowness. Both actions help isolate the root cause of a slow connection.
You are troubleshooting a BGP neighbor flapping. The neighbor state shows 'Active'. Which command will help you see the reason for the state change?
Explanation: The 'get router info bgp neighbors <neighbor>' command displays detailed information about a BGP neighbor, including its current state (e.g., Active, Established) and a history of state changes. This helps identify why the session is flapping, as it shows the last few state transitions and the associated reasons (e.g., timeouts, resets). The 'Active' state indicates the router is trying to establish a TCP connection, and the neighbor details can reveal issues like misconfigured IP addresses, AS numbers, or authentication. Option B is incorrect because 'get router info bgp neighbors <neighbor> rejected-routes' shows routes that were rejected by policy, not the reason for state changes. Option C shows routes received from the neighbor, and Option D provides a summary, neither of which directly reveals why the state changed.
An administrator runs 'diagnose sys session filter dport 443' and sees output indicating sessions with state 'proto=6 proto_state=01 duration=3600 expire=3598'. What does this output indicate about the session?
Explanation: The session shows proto=6 (TCP) and proto_state=01, which in FortiOS indicates TCP state SYN_SENT. The duration of 3600 seconds and expire of 3598 seconds suggest the session has been in SYN_SENT for an extended period, which is abnormal. Default SYN_SENT timeout is much shorter, so this session is likely stuck or expired and will be removed soon. Therefore, option A correctly describes it as an expired TCP session being removed.
A FortiGate HA cluster is experiencing persistent split-brain even after both units are rebooted. Which THREE actions should the administrator take to resolve this issue? (Choose three.)
Explanation: Split-brain occurs when HA peers lose communication over the heartbeat link, causing each unit to assume the other is down and both become active. Option A is correct because verifying the heartbeat interfaces ensures the dedicated link is functional, which is the most common root cause. Option B is correct because increasing the HA failover hold time (hold down time) can prevent transient network issues from triggering false failovers and flapping, which often resembles split-brain behavior. Option D is correct because split-brain is more likely in active-active mode; configuring active-passive mode ensures only one unit is active at any time, eliminating the possibility of both units operating independently.
A FortiGate is experiencing high memory usage due to a large number of UDP sessions. The administrator wants to reduce memory consumption without dropping legitimate traffic. Which THREE actions could help? (Choose three.)
Explanation: Enabling session-ttl enforces an idle timeout on UDP sessions, preventing them from lingering indefinitely after traffic stops. This reduces memory consumption by ensuring stale UDP sessions are removed without affecting active traffic. Option C is correct because reducing the UDP session timeout shortens the time inactive UDP sessions remain in memory, freeing up resources sooner. Option D is correct because disabling unnecessary session helpers for UDP reduces the memory overhead associated with processing and tracking sessions that don't require deep inspection, further lowering memory usage without dropping legitimate traffic.
+15 more Troubleshooting and Diagnostics questions available
Practice all Troubleshooting and Diagnostics questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of Troubleshooting and Diagnostics. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
Troubleshooting and Diagnostics questions on the NSE7 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. Troubleshooting and Diagnostics is tested as part of the Fortinet NSE 7 Advanced Security NSE7 blueprint. Practicing with targeted Troubleshooting and Diagnostics questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but Troubleshooting and Diagnostics is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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