Fortinet NSE 4 - FortiOS 7.6 Administrator (NSE4_FGT_AD-7.6) Exam Prep
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These 10 free NSE4_FGT_AD-7.6 questions are organized by exam domain, so you can see how each part of the Fortinet NSE 4 - FortiOS 7.6 Administrator (NSE4_FGT_AD-7.6) blueprint is tested. Reveal the answer and explanation under each question.

Domain 1: Deployment and system configuration (20-25%)

Question 1

During maintenance, node A rejoins a two-member active-passive FGCP cluster. Both nodes are synchronized, and all monitored interfaces are up. Override is disabled on both members, with an HA uptime margin of 300 seconds. Node A: priority 200; HA uptime 90 seconds. Node B: priority 100; HA uptime 7,200 seconds. Node B remains primary despite its lower priority. What accounts for this election result?

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Correct answer: D - B's HA uptime advantage exceeds the margin and is considered before priority.

Question 2

A FortiGate CNF instance and its AWS Gateway Load Balancer endpoint (GWLBe) are healthy. The intended security policy is attached, but a new deny rule records no hits while new test connections still reach the internet. The protected subnet's 0.0.0.0/0 route points directly to a NAT gateway. The endpoint subnet and return path are already prepared for inspection. What deployment step was omitted?

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Correct answer: D - Routing the protected subnet's internet traffic through the GWLBe.

Domain 2: Firewall policies and authentication (20-25%)

Question 3

A newly added FortiGate deny rule has not stopped new HTTPS connections from 10.24.8.0/24 to 203.0.113.60. The relevant policies are evaluated in this order: 1. ID 84: source 10.24.0.0/16; destination 203.0.113.60; TCP/443; ACCEPT. 2. ID 7: source 10.24.8.0/24; destination 203.0.113.60; TCP/443; DENY. Both policies match the incoming and outgoing interfaces and use the always schedule. Neither requires authentication. Other hosts in the /16 must retain access. The change review should approve:

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Correct answer: C - Moving ID 7 above ID 84, retaining both source objects.

Question 4

An external client must reach an HTTPS service at 203.0.113.44:8443. Central NAT is disabled on the FortiGate. The VIP maps TCP/8443 on that address to 10.50.1.44:443, where the DMZ server listens. The inbound ACCEPT policy has the correct interfaces, source, VIP destination, and schedule, but permits only service TCP/8443. Routing and the server's return path are verified. A trace shows DNAT to 10.50.1.44:443 followed by a forwarding-policy denial. To preserve both the published client port and the server's listening port, the administrator should:

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Correct answer: B - Keep the VIP mapping and change the policy service to TCP/443.

Domain 3: Content inspection (25-30%)

Question 5

Users receive a certificate warning when opening a partner website through FortiGate's full SSL inspection. Their clients already trust Fortinet_CA_SSL, but the certificate presented for this connection is signed by Fortinet_CA_Untrusted. FortiGate records resign-as-untrusted. The origin certificate's hostname and dates are valid; its private issuer is absent from FortiGate's trusted CAs. The security team has independently validated and approved that issuer. Choose the repair that retains both inspection and certificate validation.

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Correct answer: A - Import the approved origin CA chain into FortiGate's trusted CAs.

Question 6

Responders confirm exploitation of an unpatched HTTPS portal behind FortiGate. TLS deep inspection is working, and IPS events identify the exploit signature in the decrypted requests. In the sensor, a broad Monitor entry appears before an individual Block entry for that signature; both entries include it. The broad entry also includes a verified false positive triggered by legitimate transactions. Attack and legitimate requests arrive through the same upstream proxy address. What can stop the identified exploit immediately while preserving those legitimate transactions?

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Correct answer: B - Move the exploit-specific Block entry ahead of the broad Monitor entry.

Question 7

A supplier website matches a static URL entry set to Allow, yet FortiGate blocks it because its FortiGuard category is set to Block. Licensing and FortiGuard connectivity are healthy. The same web-filter profile has an enabled local category, Approved-Suppliers, set to Monitor. Which exception preserves the category block for other websites and still permits antivirus inspection of this supplier's downloads?

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Correct answer: C - Create a web-rating override for the supplier using Approved-Suppliers.

Domain 4: Routing (10-15%)

Question 8

A FortiGate SD-WAN rule uses Lowest Cost (SLA). Its target requires both latency below 60 ms and packet loss below 1%. Calculate loss from the supplied 200-probe sample. Both members are alive, have valid routes, and are permitted by the firewall policy. WAN1: configured cost 10; latency 30 ms; 4 unanswered probes out of 200. WAN2: configured cost 20; latency 45 ms; 1 unanswered probe out of 200. Which member qualifies for selection under these measurements?

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Correct answer: B - WAN2; its 0.5% loss passes, while WAN1's 2% loss fails.

Question 9

The following IPv4 routes are active on a FortiGate, and all three egress paths are reachable: 0.0.0.0/0 - wan2 - distance 1 - priority 0 10.70.0.0/16 - wan1 - distance 5 - priority 0 10.70.8.0/24 - tunnelX - distance 20 - priority 10 A permitted new session targets 10.70.8.15. No policy route or SD-WAN rule overrides ordinary destination routing. Its first packet follows:

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Correct answer: A - tunnelX; a more specific active prefix takes precedence over the less-specific routes.

Domain 5: VPNs (10-15%)

Question 10

Two FortiGates establish a site-to-site IKEv2 tunnel and pass traffic after the initial IKE_AUTH exchange. The IKE SA remains established, but every subsequent Child-SA rekey fails with a proposal error. The protected subnets are correctly mirrored, and both peers use aes256-sha256 for Phase 2. FortiGate A: Phase 2 PFS enabled; DH group 14. FortiGate B: Phase 2 PFS enabled; DH group 20. The recurring rekey failure calls for which correction?

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Correct answer: A - Configure a matching Phase 2 PFS DH group on both peers.

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