Free FCSS_NST_SE-7.4: FCSS - Network Security 7.4 Support Engineer Exam Questions and Answers
33 verified practice questions for FCSS_NST_SE-7.4.
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Last updated: September 19, 2026
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Question #1
Exhibit. Refer to the exhibit, which contains a screenshot of some phase 1 settings. The VPN is not up. To diagnose the issue, the administrator enters the following CLI commands on an SSH session on FortiGate: However, the IKE real-time debug does not show any output. Why?
Please select an optionIncorrectCorrect answer: A
Setting the application debug level alone produces no output; diagnose debug enable must also be issued to turn on debug output to the console, which is why the IKE real-time debug appears empty.
Was this answer correct?Question #2
Exhibit. Refer to the exhibit, which shows the output of a diagnose command. What can you conclude about the debug output in this scenario?
Please select an optionIncorrectCorrect answer: B
In diagnose debug rating output the Weight value is derived from the server's round-trip time and the number of requests FortiGate has sent to it, so weight and the FortiGuard-requests counter move together.
Was this answer correct?Question #3
Which statement about IKEv2 is true?
Please select an optionIncorrectCorrect answer: B
IKEv2 keeps a header format close enough to IKEv1 that both versions run on the same UDP port 500 and can be distinguished by the version field. Asymmetric authentication and the phase 1/phase 2 naming are not shared with IKEv1.
Was this answer correct?Question #4
Which exchange lakes care of DoS protection in IKEv2?
Please select an optionIncorrectCorrect answer: D
The IKE_SA_INIT exchange is where the responder can return a COOKIE notification forcing the initiator to prove source address validity, which is IKEv2's DoS protection. IKE_Auth and CREATE_CHILD_SA happen after the IKE SA exists and offer no such protection.
Was this answer correct?Question #5
An administrator wants to capture encrypted phase 2 traffic between two FotiGate devices using the built-in sniffer. If the administrator knows that there Is no NAT device located between both FortiGate devices, which command should the administrator run?
Please select an optionIncorrectCorrect answer: B
Without NAT in the path the phase 2 payload is carried in native ESP, IP protocol 50, so filtering on ip proto 50 captures the encrypted traffic. UDP 4500 would only apply if NAT traversal encapsulated it.
Was this answer correct?Question #6
Refer to the exhibit, which contains the output ofdiagnose vpn tunnellist. Which command will capture ESP traffic for the VPN named DialUp_0?
Please select an optionIncorrectCorrect answer: D
The dial-up tunnel is behind NAT, so ESP is encapsulated in UDP port 4500 by NAT traversal; sniffing on port 4500 captures it, while a plain ip proto 50 filter would see nothing.
Was this answer correct?Question #7
Exhibit. Refer to the exhibit, which shows the output of a session. Which two statements are true? (Choose Iwo.)
Select 2 answers.
Please select an optionIncorrectCorrect answer: B, C
Was this answer correct?Question #8
Refer to the exhibit,which shows the output of getrouter info ospf neighbor. What can you conclude from the command output?
Please select an optionIncorrectCorrect answer: A
Was this answer correct?Question #9
Which statement about parallel path processing is correct (PPP)?
Please select an optionIncorrectCorrect answer: A
Parallel path processing evaluates several possible processing paths at once and selects the optimal one for the packet, based on both hardware capabilities and the enabled software features such as inspection modes and policies.
Was this answer correct?Question #10
Which statement aboutprotocol options is true?
Please select an optionIncorrectCorrect answer: D
Protocol options tell the proxy which Layer 4 ports to associate with each upper-layer protocol such as HTTP, SMTP or FTP, so traffic on non-standard ports is still inspected as the right protocol.
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