Fortinet certification practice
Practise Fortinet NSE 4 Network Security Professional NSE4 practice test — original exam-style scenarios covering every exam domain, with detailed explanations, wrong-answer analysis, and common exam traps. Courseiva helps you prepare with realistic practice questions, topic-based revision, explained answers and structured study routes.
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Key facts for the Fortinet NSE 4 Network Security Professional NSE4 exam.
Exam cost
$400 USD / ~£315
Duration
105 minutes
Question count
60 questions
Passing score
65% (approximate)
Validity
2 years
Delivered by
Pearson VUE
Online proctored
Yes — available
Retake policy
100% free — no account required
Everything on Courseiva for NSE4 is free — no subscription, no trial, no email wall.
Courseiva provides free Fortinet NSE 4 Network Security Professional NSE4 (NSE4) practice questions with original exam-style questions, detailed explanations, topic-based practice, mock exams, readiness tracking, and study analytics. Courseiva is an independent platform and is not affiliated with Fortinet.
15 days after first failure; 30 days after second failure
Question formats
The Fortinet NSE 4 Network Security Professional certification validates skills in configuring, managing, and troubleshooting FortiGate firewalls and associated network security technologies. Candidates demonstrate competency in firewall policies, routing, VPN, user authentication, SSL inspection, and web filtering. It is the core credential in the Fortinet NSE certification track, sitting above the NSE 1–3 awareness levels and below the advanced NSE 5–8 specialist tiers. The NSE 4 is recognized globally by organizations running Fortinet's Security Fabric infrastructure.
Official prerequisite
No formal prerequisites; completion of NSE 1–3 and NSE 4 training courses is strongly recommended.
Recommended experience
Networking fundamentals (TCP/IP, routing, switching), basic firewall concepts, and familiarity with FortiOS.
1–2 years working with Fortinet products or similar next-generation firewalls.
Should you skip this exam?
Candidates with no networking background or those seeking a non-vendor-specific security credential.
Courseiva study tip
Use Fortinet's free NSE 4 training courses on the Fortinet Training Institute and practice on a FortiGate VM to reinforce configuration tasks.
UK salary range
£40,000–£65,000
US salary range
$65,000–$105,000
Job roles that cite NSE 4
What certification to take next
The NSE 4 exam costs approximately $400 USD when booked through Pearson VUE. Fortinet's free online training is available through the Fortinet Training Institute.
The passing score is approximately 65%, though Fortinet does not publish an exact cut score. You will receive a pass or fail result immediately after the exam.
The exam consists of 60 multiple-choice and multiple-response questions with a 105-minute time limit.
NSE 4 covers FortiGate initial configuration, firewall policies, NAT, routing, SSL and IPsec VPN, user authentication, web filtering, application control, antivirus, and logging/monitoring.
NSE 4 is moderately difficult. It is manageable for professionals with hands-on FortiGate experience but challenging for those without real-world firewall administration exposure.
NSE 4 is valid for 2 years. Renewal requires passing the current version of the NSE 4 exam or completing approved continuing education activities.
Network and security engineers who deploy, configure, or manage FortiGate firewalls and want a recognized credential demonstrating Fortinet expertise.
See how NSE 4 stacks up against related certifications.
Practice modes
Choose a mode that matches your current study phase. Use topic practice early on and mock exams closer to your exam date.
All NSE4 Questions
Browse the full question bank organised by domain and difficulty.
Practice Test
Start a session with detailed answer explanations after each question.
Mock Exam
Simulate the real exam with a timed, full-length question set.
Quick 10
A 10-question warm-up — ideal for a short daily study session.
Flashcards
Reinforce key terms, commands, and protocol facts with flashcards.
Domain Practice
Focus exclusively on one exam domain to target your weakest area.
50-Question Set
Mid-length practice set covering all domains.
Full-length Simulation
Full exam simulation matching the real question count.
Exam guide
Start with a short practice session, review each missed answer, then return to the topics that caused mistakes.
Fortinet NSE 4 Network Security Professional NSE4 questions test whether you can apply the concept in context, not just recognise a definition.
How the topic appears in realistic exam-style scenarios.
Which detail in the question changes the correct answer.
How to eliminate plausible but wrong options.
How to connect the question back to the wider exam objective.
Related practice questions
Use these internal links to move from the exam guide into focused topic practice pages.
Practise NSE4 questions linked to System and Network Administration.
Practise NSE4 questions linked to Firewall Policies and NAT.
Practise NSE4 questions linked to Authentication and VPN.
Practise NSE4 questions linked to Security Profiles.
Practise NSE4 questions linked to High Availability and Diagnostics.
Practise NSE4 questions linked to NSE4 fundamentals.
Practise NSE4 questions linked to NSE4 scenario.
Practise NSE4 questions linked to NSE4 troubleshooting.
Practice directory
Every practice set is a unique selection of questions — numbered tests, domain-focused sessions, and topic-specific quizzes.
Showing 30 of 65 tests. See all 65 NSE4 practice tests →
Timed mode
Official blueprint
Target weak areas by practising questions from a single domain. Each domain page shows all questions, difficulty breakdown, and a focused practice session.
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Free study guide
The Courseiva NSE4 study guide covers exam format, the official domain blueprint with weights, a structured study plan, and domain-specific tips for each section. Use it alongside practice questions to build both conceptual depth and exam confidence.
Sample questions
Select your answer before revealing the explanation. These questions are original exam-style — not copied from any exam or dump site.
Drag steps to the numbered slots on the right, or tap a step then tap a slot.
Drag steps to the numbered slots on the right, or tap a step then tap a slot.
Drag steps to the numbered slots on the right, or tap a step then tap a slot.
Refer to the exhibit.
config vpn ipsec phase1-interface
edit "to_Branch"
set interface "wan1"
set ike-version 2
set keylife 86400
set peertype any
set net-device disable
set mode-cfg enable
set proposal aes256-sha256
set dhgroup 14
set remote-gw 203.0.113.5
set psksecret ENC ...
next
end
config vpn ipsec phase2-interface
edit "to_Branch_p2"
set phase1name "to_Branch"
set proposal aes256-sha256
set pfs enable
set dhgrp 14
set auto-negotiate enable
set keylifeseconds 3600
next
endTrap 1: The phase1 keylife is longer than the phase2 keylife, causing rekey…
Different keylifes are acceptable; phase2 rekeys independently.
Trap 2: The 'set net-device disable' prevents the tunnel from being used…
net-device disable is typical for route-based VPNs; the tunnel interface is still used.
Trap 3: The phase2 proposal does not match the phase1 proposal.
Both use aes256-sha256; they match.
The phase1 keylife is longer than the phase2 keylife, causing rekey issues.
Why wrong: Different keylifes are acceptable; phase2 rekeys independently.
The 'set net-device disable' prevents the tunnel from being used for routing.
Why wrong: net-device disable is typical for route-based VPNs; the tunnel interface is still used.
The phase2 configuration does not specify the local and remote subnets to protect.
Without 'set src-addr-type' and 'set dst-addr-type', the tunnel does not know which traffic to encrypt.
The phase2 proposal does not match the phase1 proposal.
Why wrong: Both use aes256-sha256; they match.
Refer to the exhibit.
config firewall policy
edit 1
set name "Allow-Internet"
set srcintf "internal"
set dstintf "wan1"
set srcaddr "all"
set dstaddr "all"
set action accept
set schedule "always"
set service "ALL"
set nat enable
set logtraffic all
next
edit 2
set name "Block-SSH"
set srcintf "internal"
set dstintf "wan1"
set srcaddr "all"
set dstaddr "all"
set action deny
set schedule "always"
set service "SSH"
set logtraffic all
next
endTrap 1: The SSH connection will succeed because policy 2 is evaluated first.
Policies are evaluated from top to bottom; policy 1 is first.
Trap 2: The SSH connection will be blocked because policy 2 explicitly…
Firewall policies are evaluated in order; policy 1 (allow all) is before policy 2 (deny SSH), so policy 1 matches first and allows the traffic.
Trap 3: The SSH connection will be blocked because policy 1 does not…
Policy 1 uses service 'ALL', which includes SSH. The issue is the order.
The SSH connection will succeed because policy 1 allows all services before policy 2 is evaluated.
Policy 1 matches all traffic from internal to wan1, so SSH is allowed before reaching the deny policy.
The SSH connection will succeed because policy 2 is evaluated first.
Why wrong: Policies are evaluated from top to bottom; policy 1 is first.
The SSH connection will be blocked because policy 2 explicitly denies SSH.
Why wrong: Firewall policies are evaluated in order; policy 1 (allow all) is before policy 2 (deny SSH), so policy 1 matches first and allows the traffic.
The SSH connection will be blocked because policy 1 does not include SSH service specifically.
Why wrong: Policy 1 uses service 'ALL', which includes SSH. The issue is the order.
Trap 1: Web filtering profiles can only be applied to users who are…
Web filtering can be applied to all traffic regardless of authentication.
Trap 2: Web filtering profiles are applied globally by default.
Web filtering profiles are applied per firewall policy, not globally.
Trap 3: Web filtering profiles are used to configure SSL certificate…
SSL inspection is configured in SSL/SSH inspection profiles, not web filtering profiles.
Web filtering profiles can be used together with application control profiles.
Correct; they can be applied to the same firewall policy.
Web filtering profiles can only be applied to users who are authenticated.
Why wrong: Web filtering can be applied to all traffic regardless of authentication.
Web filtering profiles can block access to websites based on URL categories and ratings.
Correct; this is a primary function of web filtering.
Web filtering profiles are applied globally by default.
Why wrong: Web filtering profiles are applied per firewall policy, not globally.
Web filtering profiles are used to configure SSL certificate inspection.
Why wrong: SSL inspection is configured in SSL/SSH inspection profiles, not web filtering profiles.
Question Discussion
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