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Fortinet FCSS_NST_SE-7.6 Exam Syllabus Topics:

Topic	Details
Topic 1	Authentication: This section evaluates the abilities of System Administrators and requires troubleshooting both local and remote authentication methods, including resolving Fortinet Single Sign-On (FSSO) problems for secure network access.
Topic 2	System troubleshooting: This section of the exam measures the skills of Network Security Support Engineers and addresses diagnosing and correcting issues within Security Fabric setups, automation stitches, resource utilization, general connectivity, and different operation modes in FortiGate HA clusters. Candidates work with built-in tools to effectively find and resolve faults.
Topic 3	Routing: This section focuses on Network Engineers and involves tackling issues related to packet routing using static routes, as well as OSPF and BGP protocols to support enterprise network traffic flow.
Topic 4	Security profiles: This part measures skills of Security Operations Specialists and covers identifying and resolving problems linked to FortiGuard services, web filtering configurations, and intrusion prevention systems to maintain protection across network environments.
Topic 5	VPN: This section is aimed at IT Professionals and includes diagnosing and addressing issues with IPsec VPNs, specifically IKE version 1 and 2, to secure remote and site-to-site connections within the network infrastructure.

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Fortinet FCSS - Network Security 7.6 Support Engineer Sample Questions (Q47-Q52):

NEW QUESTION # 47
Which Iwo troubleshooting steps should you perform lf you encounter issues with intermittent web filter behavior? (Choose two.)

A. Check that the correct port is mapped to HTTP in the Protocol Options
B. Check that the inspection mode configured for the web filter profile matches that of the firewall policy where it is applied.
C. Check that FortiGate is not entering conserve mode.
D. Check that the communication between FortiGate and FortiGuard is stable

Answer: C,D

Explanation:
Intermittent behavior (working sometimes, failing others) points to resource or connectivity fluctuations rather than static misconfigurations.
* B. Check that FortiGate is not entering conserve mode:
* Reason: When FortiGate enters Conserve Mode (due to high memory usage), it changes its inspection behavior to save resources. Depending on the av-failopen setting, it may either bypass inspection (allowing blocked sites) or drop traffic (blocking valid sites) temporarily until memory recovers. This flapping between states causes intermittent filtering issues.
* D. Check that the communication between FortiGate and FortiGuard is stable:
* Reason: The Web Filter engine relies on real-time queries to the FortiGuard Distribution Network (FDN) to categorize URLs that are not in the local cache. If the internet connection or the specific path to FortiGuard is unstable (packet loss, latency), queries will time out. This results in "Rating Errors," which can block or allow traffic unpredictably based on the "Allow websites when a rating error occurs" setting.
* Why other options are incorrect:
* A: A mismatch in inspection mode (e.g., Profile set to Proxy, Policy set to Flow) is a static configuration error. It would typically result in the profile not being selectable or consistently failing/not applying, rather than working intermittently.
* C: If the wrong port is mapped (e.g., HTTP on 8080 is not mapped), the inspection engine will consistently ignore traffic on that port. It would not be intermittent.
Reference:
FortiGate Security 7.6 Study Guide (Web Filter): "If the connection to FortiGuard is unstable, users may experience delays or rating errors... Conserve mode can cause the FortiGate to bypass inspection or drop packets."

NEW QUESTION # 48
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?

A. Replace diagnose debug application ike -1 with diagnose debug application ipsec -1.
B. The debug shows only error messages. If there is no output, then the phase 1 and phase 2 configurations match.
C. The log-filter setting is incorrect. The VPN traffic does not match this filter.
D. The administrator must also run the command diagnose debug enable.

Answer: D

NEW QUESTION # 49
Refer to the exhibit, which shows the output of get router info bgp summary.

Which two statements are true? (Choose two.)

A. The local ForliGate has received one prefix from BGP neighbor 100.64.1.254.
B. The TCP connection with BGP neighbor 100.64.2.254 was successful.
C. The local FortiGate has received 18 packets from a BGP neighbor.
D. The local FortiGate is still calculating the prefixes received from BGP neighbor 100.64.2.264

Answer: A,C

Explanation:
The get router info bgp summary output lists BGP neighbor status:
Prefix Reception: The "State/PfxRcd" column shows the number of prefixes received from the neighbor- neighbor 100.64.1.254 has "1", confirming option A.
Received Message Count: Under "MsgRcvd", 18 packets have been received from neighbor 100.64.1.254.
This matches option C.
The second neighbor 100.64.2.254 is in "Active" state and has received/sent 0 packets, indicating that its TCP connection is NOT established, disproving option B.
There is no indication anywhere that the router is "still calculating" prefixes; "Active" just means no session is established, so option D is incorrect.
References:
FortiOS BGP Command Reference: BGP Neighbor States, PfxRcd, and Counters

NEW QUESTION # 50
Refer to the exhibit, which shows the output of a debug command.

Which two statements about the output are true? (Choose two.)

A. In the network connected to port4, two OSPF routers are down.
B. The interlace is part of the OSPF backbone area.
C. There are a total of five OSPF routers attached to the vorz4 network segment
D. One of the neighbors has a router ID of 0.0.0.4.

Answer: B,C

Explanation:
References:
FortiOS Admin Guide: OSPF, Debug Outputs

NEW QUESTION # 51
When FortiGate enters conserve mode because of memory pressure, which action can FortiGate perform to preserve memory?

A. FortiGate automatically reboots to clear memory and restore full operation.
B. FortiGate reduces or stops non-essential processes tike logging and antivirus scanning
C. Fortigate begins dropping all new sessions to protect resources.
D. FortiGate switches to a less memory-intensive inspection mode, such as flow-based inspection.

Answer: C

Explanation:
When the FortiGate enters Conserve Mode due to high memory pressure (specifically reaching the Extreme Threshold at 95% memory usage, or the Red Threshold for proxy traffic), the system prioritizes stability and preventing a system crash (kernel panic).
* D. FortiGate begins dropping all new sessions to protect resources:
* In Extreme Conserve Mode (95%), the FortiGate kernel acts to preserve the remaining memory for system-critical tasks (like admin access and basic packet forwarding of existing sessions). To achieve this, it drops all new session initiation requests regardless of the inspection type.
* In Red Conserve Mode (88%), it specifically drops new sessions that require proxy-based inspection (as these consume the most memory), while often still allowing flow-based traffic.
* Among the provided choices, "dropping new sessions" is the only standard protective mechanism FortiOS employs to stop memory usage from climbing further.
Why other options are incorrect:
* A: FortiGate does not automatically reboot in conserve mode; it attempts to recover by restricting traffic. (Reboot is a last-resort crash, not a configured action).
* B: Inspection modes (Proxy vs. Flow) are defined in firewall policies and cannot be dynamically switched by the system during runtime.
* C: The system does not arbitrarily stop "non-essential processes" like logging or AV. Logging is critical for audit trails. While av-failopen can be configured to bypass scanning, the system typically defaults to "Fail-Close" (dropping traffic) rather than stopping the engines themselves.
Reference:
FortiGate Security 7.6 Study Guide (Diagnostics & Resource Usage): "When memory usage reaches the extreme threshold (95%), all new sessions are dropped to prevent memory exhaustion."

NEW QUESTION # 52
......

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