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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | Fortinet FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Available Languages: | English |
| Exam Format: | Scenario-based questions, Multiple Select, Multiple Choice |
| Related Certifications: | FCSS - SD-WAN 7.6 Architect FCSS - LAN Edge 7.6 Architect FCSS - Enterprise Firewall 7.6 Administrator |
| Passing Score: | Not publicly disclosed (Pass/Fail result) |
| Certificate Validity Period: | 2 years |
| Exam Price: | $200 USD (excluding taxes) |
| Real Exam Qty: | 40 (range: 35โ45) |
| Exam Duration: | 75 minutes |
| Recommended Training: | FortiOS 7.6 Administration and Troubleshooting Fortinet NSE 6 - Network Security Support Engineer Course |
| Exam Registration: | Pearson VUE Registration Fortinet Training Institute |
| Sample Questions: | Fortinet FCSS_NST_SE-7.6 Sample Questions |
| Exam Way: | Online proctored or onsite at Pearson VUE test centers |
| Pre Condition: | No mandatory prerequisites; recommended: NSE 4 certification or equivalent knowledge, networking/security fundamentals, hands-on FortiGate experience |
| Official Syllabus URL: | https://training.fortinet.com/local/staticpage/view.php?page=fcss_network_security |
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NEW QUESTION # 126
When FortiGate enters conserve mode because of memory pressure, which action can FortiGate perform to preserve memory?
Answer: D
Explanation:
The best verified answer is C.
The study guide says that when FortiGate is in conserve mode, it activates protection measures to recover memory space:
"System configuration cannot be changed"
"FortiGate skips quarantine actions (including FortiSandbox analysis)"
It also explains that inspection behavior can be reduced while in conserve mode:
"pass (default): All new sessions pass without inspection until FortiGate switches back to non-conserve mode."
"The av-failopen setting also applies to flow-based antivirus inspection." The FortiOS administration guide summarizes this behavior as:
"This causes functions such as antivirus scanning to change how they operate to reduce the functionality and conserve memory without compromising security." That is why C is the closest correct choice: FortiGate can reduce functionality of some processes, especially antivirus-related inspection, to preserve memory.
Why the other options are wrong:
A is wrong because FortiGate does not automatically reboot as a default conserve-mode action. A reboot can be configured through an automation stitch, but that is an optional administrator-defined response, not the built-in conserve-mode behavior B is wrong because the documentation does not say FortiGate switches from proxy-based inspection to flow-based inspection. Instead, it may pass traffic without inspection depending on av-failopen settings D is not generally correct for conserve mode. The study guide says FortiGate starts dropping new sessions only when memory usage exceeds the extreme threshold: "If memory usage exceeds the extreme threshold, all new sessions that require inspection (flow-based or proxy-based) are blocked." So the verified answer is: C.
NEW QUESTION # 127
Refer to the exhibit.
The exhibit shows the output of a session. Which two statements are correct? (Choose two.)
Answer: C,D
Explanation:
The correct answers are C and D .
For D , the session output shows proto=6, which means TCP, and proto_state=01. The study guide explains that for TCP sessions, "the first number (from left to right) is related to the server-side state and is 0 when the session is not subject to any inspection (flow or proxy). ... The second digit is the client-side state." It also shows that value 1 = ESTABLISHED So proto_state=01 means:
* first digit 0 = no inspection
* second digit 1 = ESTABLISHED
That confirms the TCP session has been successfully established.
For C , the study guide section "Session for an Authenticated User" states: "Any session for traffic coming from an authenticated user contains the authed flag. Additionally, the username is added to the session information." In the exhibit, the session contains user=User1 and an authentication state flag (authd), which indicates the session is associated with an authenticated user.
Why the other options are wrong:
* A is wrong because the session did match a firewall policy . The study guide says the session output includes "The ID of the matching policy" In the exhibit, the session shows policy_id=1 , so a firewall policy was matched.
* B is wrong because the study guide explains the gwy field as:
* first value = gateway to destination
* second value = gateway to source The exhibit shows gwy=10.1.0.254/10.1.10.1, so:
* gateway to destination = 10.1.0.254
* gateway to source = 10.1.10.1
So the verified answers are: C, D .
NEW QUESTION # 128
Which two statements about application-layer test commands are true? (Choose two answers)
Answer: A,D
Explanation:
The correct answers are A and D.
The study guide states:
"Application layer test commands do not display information in real time. They display statistics and configuration information about a feature or process. You can also use some of these commands to restart a process or execute a change in its operation." This directly proves:
A is correct because they can display statistics and configuration information D is correct because some of them can restart a process/application Why the other options are wrong:
B is wrong because the study guide explicitly says application-layer test commands do not display information in real time. Real-time output is done with diagnose debug application ... commands instead.
C is wrong because diagnose debug console enable is related to debug output behavior, not a requirement for application-layer test commands to display output. The study guide does not describe test commands that way.
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NEW QUESTION # 129
A VPN tunnel is up. To monitor traffic flow, the administrator enters the following CLI commands on an SSH session on FortiGate:
# diagnose debug enable
# diagnose sniffer packet any 'udp and port 500' 4
However, the sniffer does not show any output. Assuming default configuration values, what are two possible reasons there is no output? (Choose two answers)
Answer: B,D
Explanation:
The correct answers are A and B.
The study guide says:
"If NAT-T is enabled, and there is a FortiGate located in the middle that is running NAT, the sniffer command must use a different filter. In this case, IKE traffic uses UDP port 500, but switches to UDP port 4500 during the tunnel negotiation. Additionally, ESP traffic is encapsulated inside the UDP 4500 channel." It also says:
"In some networks, UDP is blocked by firewalls or ISPs. In those cases, you can configure your VPN tunnel to use IKE over TCP in the phase 1 configuration. The default IKE TCP port is 443..." And the study guide gives the correct capture examples:
No NAT: host <remote-gw> and udp port 500
With NAT and NAT-T: host <remote-gw> and (udp port 500 or udp port 4500) So:
B is correct because with NAT Traversal enabled, the tunnel may no longer be using only UDP 500. It can move to UDP 4500, so the current filter may miss the traffic.
A is correct because the filter may need to be expanded to include UDP 4500 for NAT-T, or TCP 443 when IKE over TCP is used.
Why the other options are wrong:
C is wrong because restricting the filter to the remote peer IP can make the capture more precise, but it is not required for the sniffer to display output. The problem here is the port/protocol choice, not the lack of a host filter. The study guide examples use host filtering as an aid, not as a requirement.
D is wrong because diagnose debug enable is used to enable real-time debug output for applications, but it does not suppress or invalidate sniffer output. Sniffer capture is a separate command path. Fortinet documentation separately documents diagnose sniffer packet ... for packet capture and diagnose debug enable for debug features.
So the verified answers are: A, B.
NEW QUESTION # 130
What are two reasons you might see iprope_in check () check failed, drop when using the debug How? (Choose two.)
Answer: B,C
Explanation:
The debug flow message iprope_in_check() check failed, drop specifically indicates a failure in the Local-In Policy check. The "iprope" (IP ROouting Policy Enforcement) engine handles policy lookups. The _in_check suffix confirms that the decision is regarding traffic destined to the FortiGate itself (Local-In traffic), rather than traffic passing through it.
D . The packet was dropped because the requested service is not enabled on FortiGate:
This is the most common cause. When a packet arrives destined for the FortiGate's interface IP (e.g., an HTTPS or SSH request), the kernel checks if that specific service is enabled in the interface settings (set allowaccess). If the service is not enabled (e.g., trying to Ping an interface where PING access is disabled), the iprope_in_check function fails and drops the packet immediately.
C . The packet was dropped because the trusted host list is misconfigured:
Even if the service (e.g., HTTPS) is enabled on the interface, the FortiGate checks the Administrator settings. If Trusted Hosts are configured, the source IP of the incoming packet is compared against the allowed list. If the IP is not on the list, the Local-In policy check (iprope_in_check) fails, and the packet is dropped to secure the management plane.
Why other options are incorrect:
A: If traffic is dropped by a standard Firewall Policy (traffic passing through the device from one interface to another), the debug message will typically state denied by policy x or no matching policy. It would generally be a forward check (iprope_fwd_check or similar), not an _in_check.
B: If there is no route to the source, the error is a Reverse Path Forwarding (RPF) failure. The debug flow logs this explicitly as reverse path check fail, drop.
Reference:
FortiGate Troubleshooting Guide (Debug Flow): "The message iprope_in_check() check failed indicates the packet was denied by the Local-In policy. This occurs when traffic destined to the FortiGate is not allowed by the allowaccess configuration or is blocked by Trusted Host settings."
NEW QUESTION # 131
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