The answer is to enable IPS hardware acceleration using NPU offloading, along with tuning IPS profiles and raising threshold levels. This is correct because the ipsengine process handles deep packet inspection, which is CPU-intensive; offloading this work to the FortiGate’s Network Processor (NPU) reduces the CPU burden by handling pattern matching and flow-based inspection in hardware, while profile tuning eliminates unnecessary signatures and raising thresholds filters out low-risk traffic. On the Fortinet NSE 7 Advanced Security exam, this scenario tests your ability to apply performance optimization techniques under the “System Performance” domain, often appearing as a multi-select question where the trap is choosing to disable IPS entirely or increase logging instead of using hardware acceleration. A useful memory tip is “HARD offload, TUNE profiles, RAISE thresholds” — think of the acronym HTR to recall the three actions.
NSE7 Troubleshooting and Diagnostics Practice Question
This NSE7 practice question tests your understanding of troubleshooting and diagnostics. 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.
A network admin is investigating a high CPU usage issue on a FortiGate firewall. The admin runs 'diagnose sys top' and sees that the 'ipsengine' process is consuming 70% CPU. Which THREE actions should the admin take to reduce CPU load?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Review and optimize IPS signatures; disable unnecessary signatures
High CPU usage from ipsengine can be mitigated by tuning IPS profiles, offloading inspection to NPU, or raising thresholds to reduce load from less important traffic.
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.
✓
Review and optimize IPS signatures; disable unnecessary signatures
Why this is correct
Reducing the number of active signatures directly reduces CPU overhead.
Related concept
Static NAT maps one inside address to one outside address.
✗
Increase the IPS engine process priority
Why it's wrong here
Increasing priority would worsen CPU contention, not reduce load.
✗
Increase the IPS engine process priority
Why it's wrong here
This is a duplicate; also, raising priority is not helpful.
✗
Disable IPS on all policies
Why it's wrong here
Completely disabling IPS is too drastic and would remove security protection; better to optimize profiles.
✓
Enable IPS hardware acceleration using NPU offloading
Why this is correct
NPU offloading can reduce CPU load by processing IPS signatures in hardware.
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.
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.
Troubleshooting and Diagnostics — This question tests Troubleshooting and Diagnostics — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Review and optimize IPS signatures; disable unnecessary signatures — High CPU usage from ipsengine can be mitigated by tuning IPS profiles, offloading inspection to NPU, or raising thresholds to reduce load from less important traffic.
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.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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Question Discussion
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