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System and Network Administration

Practise Fortinet NSE 4 Network Security Professional NSE4 System and Network Administration practice questions — original exam-style scenarios with answer choices, explanations, and analysis of common mistakes.

60 questions12 easy32 medium16 hard

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What to know about System and Network Administration

System and Network Administration 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.

Watch out for

Common System and Network Administration exam traps

  • Answering from memory before reading the full scenario.
  • Missing a constraint such as cost, availability, security, scope or command context.
  • Choosing a broad answer when the question asks for the most specific fix.
  • Ignoring why the wrong options are tempting.

Question index

All System and Network Administration questions (60)

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1

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?

Medium
2

A medium-sized enterprise has a FortiGate 100F in NAT/Route mode with three interfaces: port1 (WAN, 203.0.113.1/24, gateway 203.0.113.254), port2 (internal, 192.168.1.1/24), and port3 (DMZ, 10.0.0.1/24). The internal network hosts a web server at 192.168.1.10 and a mail server at 192.168.1.20. The DMZ hosts a public web server at 10.0.0.10 and a public DNS server at 10.0.0.20. The company has a single public IP 203.0.113.1. The administrator has configured the following: - Port forwarding: external HTTP to DMZ web server (10.0.0.10:80) and external DNS to DMZ DNS server (10.0.0.20:53). - Outbound NAT (IP Pool) for internal users to 203.0.113.1. - Firewall policies allowing internal to external, DMZ to external, and external to DMZ (for forwarded services). Users report that they can access the Internet but cannot reach the internal web server (192.168.1.10) via its public IP (203.0.113.1:80). The DMZ web server is accessible from the Internet. What is the most likely cause?

Hard
3

A FortiGate in NAT/Route mode has a policy with NAT enabled. The admin needs the source IP of traffic from internal users (192.168.1.0/24) to be translated to the interface IP of port1 (203.0.113.1) when accessing the internet. Which configuration is necessary?

Hard
4

An administrator is configuring a FortiGate HA cluster in active-passive mode. Which two statements are correct about this configuration?

Medium
5

An administrator configures an aggregate interface (port1 and port2) on a FortiGate. After connecting the switch ports, the aggregate interface shows 'down'. The individual member ports are up. What is the MOST likely cause?

Hard
6

A network administrator configures a new FortiGate as the default gateway for a subnet. The FortiGate has two WAN interfaces (port1 and port2) connected to different ISPs. The admin wants to load-balance outbound traffic across both links. Which configuration method will achieve this goal?

Medium
7

Which ONE of the following is a valid method to upgrade the FortiGate firmware? (Choose one.)

Medium
8

An administrator needs to integrate a FortiGate with FortiAnalyzer for centralized logging. After configuring the FortiAnalyzer IP and enabling logging, the FortiGate shows 'connection refused' for FortiAnalyzer. What is the most likely cause?

Medium
9

A FortiGate is configured in transparent mode. Which of the following statements is true?

Easy
10

A FortiGate is configured with two WAN interfaces in an active-passive HA cluster. The administrator notices that the passive unit is not synchronizing configuration changes from the active unit. What is the MOST likely cause?

Medium
11

A FortiGate is configured with two equal-cost default routes to different ISPs. The administrator notices that traffic for a specific destination is load-balanced across both links as expected. However, they want all traffic from a specific source IP to use only ISP1, while other traffic remains load-balanced. Which configuration should be applied?

Hard
12

An administrator is configuring a FortiGate in transparent mode and needs to forward traffic between two VLANs. Which three configurations are required? (Choose three.)

Hard
13

A FortiGate is configured in an HA cluster with two units. The cluster is working, but the administrator wants to ensure that configuration changes made on the primary unit are automatically synchronized to the secondary unit. Which two conditions must be met? (Choose TWO.)

Hard
14

A network administrator needs to allow SSH access to the FortiGate from a management subnet 10.0.1.0/24. Which configuration step is required on the interface connected to that subnet?

Easy
15

A FortiGate administrator wants to integrate the FortiGate with a FortiAnalyzer for centralized logging. Which configuration step is required on the FortiGate?

Medium
16

What is the primary purpose of configuring a loopback interface on a FortiGate?

Easy
17

An administrator wants to synchronize the FortiGate's time with a reliable NTP server. After configuring the NTP server, they notice the time is still incorrect. What could be the issue?

Medium
18

An administrator wants to aggregate two physical interfaces (port1 and port2) on a FortiGate to increase bandwidth and provide redundancy. Which interface type should be created?

Medium
19

An administrator is troubleshooting a connectivity issue. A ping from the FortiGate to 8.8.8.8 succeeds, but traffic from internal hosts to the internet is failing. The firewall policy allows the traffic. What is the most likely cause?

Medium
20

An admin is configuring ECMP (Equal Cost Multi-Path) on a FortiGate with two ISPs. Which TWO conditions must be met for ECMP to load balance traffic across both links? (Choose two.)

Easy
21

A FortiGate is configured with an aggregate interface (link aggregation group) consisting of two physical ports. The administrator notices that traffic is not being distributed evenly across the two links. Which configuration setting should be verified to improve load balancing?

Medium
22

A FortiGate configured in transparent mode needs to allow HTTP traffic between two VLANs. The administrator has created a firewall policy. However, traffic is still blocked. Which TWO additional configurations are necessary for transparent mode operation?

Hard
23

A FortiGate administrator needs to allow remote management from the internet only from a specific IP address. Which configuration achieves this?

Medium
24

A FortiGate administrator needs to upgrade the firmware from 7.0.5 to 7.2.0. The current firmware is 7.0.5. What is the recommended upgrade path?

Medium
25

What is the purpose of configuring a loopback interface on a FortiGate?

Easy
26

You run 'diagnose sys session filter dport 443' and see the following output: proto=6 proto_state=01 duration=3600 expire=3599 What does this indicate about the session?

Hard
27

An admin wants to monitor CPU and memory usage on a FortiGate using SNMP. Which configuration is required?

Medium
28

An administrator is configuring a FortiGate to use FortiManager for centralized management. Which three steps are required?

Medium
29

An administrator configures a FortiGate in transparent mode to be deployed between a router and a switch. After installation, traffic passes through but the administrator cannot access the FortiGate's management IP from the management network. What is the MOST likely reason?

Hard
30

An administrator configures a policy route to direct traffic from subnet 10.1.1.0/24 to the internet via ISP1 with a gateway of 203.0.113.1. However, traffic from that subnet is still using the default route via ISP2. What is the MOST likely cause?

Medium
31

A FortiGate is configured with two equal-cost static default routes via two ISPs. The administrator wants to use both links simultaneously for outbound traffic, distributing sessions per source-destination pair. Which ECMP load balancing method should be configured under config system settings?

Medium
32

A FortiGate admin notices that HTTPS traffic to a web server is not being scanned by the antivirus profile applied to the firewall policy. The admin confirms the policy is correct and antivirus is enabled. What is the MOST likely reason the traffic is not being scanned?

Medium
33

An administrator needs to configure a FortiGate to allow remote management via HTTPS from the internet. Which configuration step is required?

Easy
34

An administrator needs to allow SSH access to the FortiGate's management interface from a specific management subnet (10.0.1.0/24). Which configuration achieves this?

Medium
35

A FortiGate is operating in transparent mode. The admin needs to allow HTTP traffic from users to a web server. Which type of firewall policy is required?

Medium
36

An administrator configures a policy route to send all traffic from subnet 172.16.1.0/24 to a specific next-hop 10.0.0.2. However, the traffic is still using the default route. What could be the reason?

Medium
37

Which FortiGate operating mode allows the device to act as a transparent layer 2 bridge, forwarding traffic without performing NAT or routing?

Easy
38

You notice that the FortiGate HA cluster is not failing over when the primary unit loses power. The HA configuration shows 'set ha-priority 250' on the primary and 'set ha-priority 200' on the secondary. What is the most likely cause?

Medium
39

A network administrator is configuring a FortiGate for the first time and needs to enable administrative access via HTTPS from the internal network. Which configuration step is required?

Easy
40

A FortiGate administrator is upgrading firmware from version 6.0 to 7.0. The upgrade path requires multiple steps. Which of the following is the recommended method to ensure a successful upgrade?

Hard
41

An administrator has configured two FortiGate units in an active-passive HA cluster. The primary unit fails. How does the secondary unit become active?

Easy
42

An administrator configures a policy route to send all traffic from a specific subnet to a different next-hop. However, traffic from that subnet is still using the default route. Which configuration could be causing this?

Hard
43

An administrator wants to allow only HTTPS and SSH administrative access to the FortiGate from a specific management subnet 192.168.100.0/24. Which TWO steps must be taken on the FortiGate?

Medium
44

An administrator needs to configure DNS on a FortiGate so that internal hosts can resolve external domain names. Which two settings are required? (Choose two.)

Easy
45

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?

Hard
46

A FortiGate admin notices that HTTPS traffic to a web server is not being scanned by the antivirus profile applied to the firewall policy. The admin confirms the policy is correct and antivirus is enabled. What is the MOST likely reason the traffic is not being scanned?

Medium
47

An administrator wants to configure SNMP on a FortiGate to allow a monitoring server 192.168.1.100 to poll read-only information. Which set of commands is correct?

Medium
48

An administrator wants to ensure that traffic to a specific web server always exits through a particular ISP link, regardless of route changes. Which feature should be configured?

Easy
49

A FortiGate has been configured with two WAN interfaces (wan1, wan2) in an SD-WAN zone. The administrator wants to ensure that traffic for a specific internal server uses only wan1. What is the most appropriate method?

Easy
50

During a firmware upgrade, the admin uploads the image via the GUI and clicks 'Upgrade'. The FortiGate reboots but comes up with the old firmware. What is the MOST likely cause?

Hard
51

A FortiGate administrator is setting up a new FortiGate and needs to integrate it with FortiAnalyzer and FortiManager. Which THREE statements are correct regarding this integration?

Hard
52

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?

Medium
53

A network administrator needs to configure a FortiGate to allow administrative access from a specific management subnet only. Which configuration step should be taken?

Medium
54

A FortiGate administrator needs to configure NTP to ensure accurate time on the device. Which two steps are required? (Choose two.)

Medium
55

A network administrator notices that after configuring a new static route on a FortiGate, traffic to a remote subnet is still being forwarded via the default route. The administrator confirms the static route is present in the routing table with a lower distance than the default route. What is the MOST likely cause?

Medium
56

An administrator is configuring SNMP on a FortiGate for monitoring. Which THREE items are required for SNMPv3 configuration?

Medium
57

A FortiGate administrator configures policy-based routing (PBR) to direct traffic from subnet 192.168.1.0/24 to the internet via ISP1. However, traffic from that subnet is still using the default route via ISP2. What is the most likely cause?

Hard
58

A network administrator is configuring a new FortiGate and needs to ensure that all traffic from the internal network to the internet is source NATed to the public IP address on port1. The default route points to port1. Which configuration step is required to achieve this?

Medium
59

An administrator configures a VLAN interface on a FortiGate's physical port with the IP 192.168.10.1/24. The VLAN ID is 10. The administrator connects a switch port configured as an access port (untagged) in VLAN 10. The devices on the switch cannot ping the FortiGate's VLAN interface. What is the most likely cause?

Hard
60

After upgrading FortiGate firmware from 6.0 to 7.2, an administrator notices that a static route pointing to a next-hop IP 10.0.0.1 is no longer working. The route is present in the configuration but the FortiGate shows it as 'not active'. What is the MOST likely cause?

Medium

Frequently asked questions

What does the System and Network Administration domain cover on the NSE4 exam?
System and Network Administration questions test whether you can apply the concept in context, not just recognise a definition.
How many questions are in this domain?
This page lists all 60 System and Network Administration questions in the NSE4 question bank. The actual exam draws from this domain proportionally to its weighting in the official exam blueprint.
What is the best way to practise this domain?
Start with a short focused session (10 questions) to identify gaps, then work through explanations. Repeat with a longer session once the weak areas feel solid.
Can I practise only System and Network Administration questions?
Yes — the session launcher on this page filters questions to this domain only. Choose any session length for inline explanations and scoring.
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