Simulate the real Fortinet NSE 4 Network Security Professional NSE4 exam with full-length timed sessions. Questions drawn proportionally from all 5 official blueprint domains — the same mix you'll face on test day.
Simulate real exam conditions
For the most realistic NSE4 simulation, start a 60 or 120-question session, put away all notes, set a timer matching the real exam duration (105 minutes), and commit to each answer before moving forward. This trains the time management and decision-making skills the real exam tests.
This free NSE4 mock exam uses the same question distribution as the real Fortinet NSE 4 Network Security Professional NSE4 exam. Each session draws questions proportionally from all 5 official blueprint domains published by Fortinet, so the topic mix you see accurately reflects what you'll face on test day.
NSE4 Domain Distribution
System and Network Administration
Firewall Policies and NAT
Authentication and VPN
Security Profiles
High Availability and Diagnostics
Every question is written by certified engineers against the 2026 NSE4 exam objectives. These are original practice questions — not dumps — so you build real understanding rather than memorising answers.
Both the mock exam and practice test use the same question bank. The difference is in how you use them — and when to use each during your NSE4 study plan.
Practice test — for learning
Use the NSE4 practice test when you are studying a domain. Answer questions, read every explanation immediately, and build understanding. Do 10–30 questions per domain per session. This is your primary study tool for the first 4 weeks.
Go to practice test →Mock exam — for simulation
Use the NSE4 mock exam in the final 1–2 weeks before your test date. Complete a 60 or 120-question session without stopping, manage your time, then review all results at the end. This builds exam-day stamina and surfaces final weak spots.
Start 120-question mock →Try these sample questions from the mock exam bank. Commit to an answer before revealing the explanation.
A FortiGate is configured with two ISPs (WAN1 and WAN2) and uses SD-WAN for load balancing. The administrator notices that traffic to a critical SaaS application is being sent over the slower link. What should the administrator do to ensure this traffic uses the faster link?
Select an answer to reveal the explanation
A company is deploying a FortiGate HA cluster in active-passive mode across two data centers. The network team reports that after a failover, some existing TCP sessions are dropped. Which configuration change should be applied to maintain session persistence during failover?
Select an answer to reveal the explanation
A FortiGate administrator is troubleshooting a problem where users cannot access the Internet. The FortiGate has a default route pointing to the ISP gateway. The administrator runs 'execute ping 8.8.8.8' from the FortiGate CLI and it succeeds. However, internal users behind NAT are unable to reach external servers. Which is the most likely cause?
Select an answer to reveal the explanation
A company uses FSSO (Fortinet Single Sign-On) with a domain controller. Users authenticate to the domain, and the FortiGate retrieves the login events. The firewall policy uses the FSSO group. Some users report that after logging in, they cannot access resources that require authentication. The administrator checks the FSSO status and sees that the FortiGate is receiving login events. What is the most likely cause?
Select an answer to reveal the explanation
A company uses FortiGate with firewall policies to control access between internal VLANs. Users in VLAN 10 report they can access internet but cannot reach a server in VLAN 20 on port 443. The server is reachable from other VLANs. The administrator checks the firewall policy configuration: there is a policy from VLAN10 to VLAN20 allowing HTTPS, with NAT disabled and logging enabled. The policy has a schedule set to 'Always'. The administrator also checks that there are no overlapping policies. What is the most likely cause?
Select an answer to reveal the explanation
A company has a FortiGate with two ISPs: wan1 (primary) and wan2 (backup). They want all outbound traffic from internal users to use wan1, and if wan1 fails, traffic should automatically fail over to wan2. The administrator configures static routes: default route via wan1 gateway with distance 10 and default route via wan2 gateway with distance 20. They also configure an SD-WAN zone with both interfaces and set a strategy of 'Manual' with 'Best Quality' for wan1. After testing, failover does not occur when wan1 goes down. What is the most likely reason?
Select an answer to reveal the explanation
An administrator is configuring a site-to-site IPsec VPN between two FortiGates. After applying the configuration, the VPN status shows 'down'. Phase 1 parameters are identical on both sides. What is the most likely cause of the failure?
Select an answer to reveal the explanation
Refer to the exhibit. A network administrator configured an IPsec VPN between the main office and a branch office. Remote users at the branch office report that they cannot access resources in the main office. The tunnel status shows up on both sides. What is the most likely cause of the connectivity issue?
Select an answer to reveal the explanation
A network administrator is troubleshooting an IPsec VPN tunnel between two FortiGates. Phase 1 is up, but Phase 2 fails to establish. The debug command 'diagnose vpn ike log' shows: 'no suitable proposal found'. What is the most likely cause?
Select an answer to reveal the explanation
An administrator wants to inspect SSL traffic to a specific finance application that uses a custom port (9443) and a self-signed certificate. Which configuration is required?
Select an answer to reveal the explanation
A company with 500 employees uses FortiGate as their internet gateway. They recently enabled SSL deep inspection using the built-in CA certificate. After deployment, many users report that they cannot access their online banking websites. The error message in the browser says 'The certificate is not trusted'. The administrator has already pushed the FortiGate CA certificate to all domain-joined computers via Group Policy. However, the problem persists for banking sites. The administrator also notices that banking sites load fine on mobile devices that do not have the CA certificate installed. What is the most likely cause and solution?
Select an answer to reveal the explanation
A network administrator notices that an IPS sensor is generating excessive false positives for a specific signature. The administrator wants to exclude traffic from a trusted internal server (IP 10.1.1.100) from inspection for that signature only, while keeping other signatures active. Which configuration change should the administrator apply?
Select an answer to reveal the explanation
A company has two remote sites connected via an SD-WAN overlay. The headquarters uses a FortiGate with two WAN links: Fiber (priority 1) and LTE (priority 2). The SD-WAN rule for business-critical traffic uses the 'best quality' strategy with SLA targets for latency and jitter. The fiber link occasionally experiences high jitter but low latency. The engineer notices that traffic is not failing over to LTE even when jitter exceeds the threshold. What is the most likely reason?
Select an answer to reveal the explanation
An SD-WAN rule is configured with a 'manual' strategy and multiple members. The engineer wants to ensure that voice traffic always uses the MPLS link as long as it meets the SLA, otherwise use the broadband link. Which configuration is required?
Select an answer to reveal the explanation
An administrator runs 'diagnose sys session filter dport 443' and then 'diagnose sys session list'. The output shows many sessions with 'proto_state=01' and 'expire=3599'. What does 'expire=3599' indicate?
Select an answer to reveal the explanation
Answer all 15 questions to see your domain score breakdown
Sitting the NSE4 under real exam conditions is a skill in itself. Candidates who underperform often do so not because of knowledge gaps, but because of poor time management or test anxiety. Use your final mock exam sessions to address both.
The NSE4 exam lasts 105 minutes. Do not spend more than 90 seconds on any single question on the first pass. Flag difficult ones and return to them after completing the rest.
On every question, immediately eliminate obviously wrong choices. Even if you are unsure between two options, narrowing to two doubles your odds. Most NSE4 distractors contain a subtle error — re-read the scenario constraint before committing to the answer that sounds most familiar.
Fortinet writes many NSE4 questions as realistic scenarios. Read the final sentence first — it tells you what is being asked. Then re-read the scenario with the question in mind to avoid wasting time on irrelevant details.
The real NSE4 is a mental marathon lasting 105 minutes. In the week before your exam, complete at least two full timed mock sessions on separate days to build concentration stamina. If you cannot stay focused for 105 minutes in practice, you will struggle on exam day.
Questions
60
On the real exam
Time limit
105 min
1.8 min per question
Passing score
650/1000
Scaled scoring
The NSE4 uses scaled scoring — your raw percentage correct is converted to a score out of 1000. Consistently scoring above 80% on mock exams puts you well above the 650/1000 threshold, giving you a buffer for any unexpected question types on the real exam.
Yes. Courseiva provides free NSE4 mock exam questions across all official exam domains. The platform includes timed simulation, per-domain score breakdown, missed-question review, and readiness tracking. No account required — free forever, supported by advertising.
The practice test is optimised for learning: you see explanations after each question immediately. The mock exam is optimised for simulation: you answer all questions under time pressure and review at the end. Use practice tests for studying and mock exams for benchmarking.
Aim for consistent scores of 80% or above on full-length NSE4 mock exams before booking your test date. The official passing score of 650/1000 corresponds to roughly 72–75% correct answers, so an 80% buffer accounts for difficulty variation and question styles on the real exam.
Most candidates who pass NSE4 on their first attempt complete 3–5 full-length mock exams in the two weeks before their test. This is enough to identify final weak spots, build stamina, and verify readiness without over-stressing or running out of fresh questions.
No — all Courseiva questions are original, written by certified engineers against public Fortinet exam blueprints. Exam dumps are memorised real exam questions shared illegally. Using dumps violates your Fortinet certification agreement and can result in your certification being revoked. Our questions make you genuinely competent, not just test-day lucky.
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