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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Real Exam Qty: | 40 |
| Related Certifications: | FCSS in Network Security |
| Exam Price: | USD 200 |
| Passing Score: | Pass/Fail (No specific score published) |
| Certificate Validity Period: | 2 years |
| Exam Format: | Multiple-choice |
| Available Languages: | English, Japanese |
| Exam Duration: | 75 minutes |
| Sample Questions: | Fortinet FCSS_NST_SE-7.6 Sample Questions |
| Exam Way: | Pearson VUE (Online or Onsite) |
| Pre Condition: | Recommended NSE 4 and NSE 5 certifications. |
| Official Syllabus URL: | https://training.fortinet.com/local/staticpage/view.php?page=nse_certs |
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NEW QUESTION # 92
Refer to the exhibits.
An administrator Is expecting to receive advertised route 8.8.8.8/32 from FGT-A. On FGT-B, they confirm that the route is being advertised and received, however, the route is not being injected into the routing table. What is the most likely cause of this issue?
Answer: B
Explanation:
The 8.8.8.8/32 route is visible in the OSPF database on FGT-B but not installed into the routing table-the most likely explanation is that FGT-B is filtering it from being installed.
NEW QUESTION # 93
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?
Answer: C
Explanation:
To display debug output on FortiGate devices, you must always run both the application-specific debug command and the global debug enable command. The command diagnose debug application ike -1 sets up the detail level for the IKE daemon debug, but it does not display any debug output on its own. As described in the FortiOS CLI debugging manuals, the command diagnose debug enable activates debug output on the console, making all previously set debugs visible. This is especially important for VPN troubleshooting- without the enable command, no output appears even if there is VPN traffic.
The correct diagnostic sequence is:
* diagnose debug application ike -1
* diagnose debug enable
This procedure is found in every FortiOS CLI debug tutorial and troubleshooting workflow.
References:
FortiOS CLI Reference: Debugging VPNs and Real-time Debug Output
FortiGate VPN Troubleshooting Guide: Required Steps for Debug Output
NEW QUESTION # 94
Refer to the exhibit.
Which two observations can you make about the web filter traffic captured using the flow tool? (Choose two.)
Answer: A,B
Explanation:
Analyze the "Send to Application Layer" Message:
The most critical line in the debug output is: id=65308 ... func=av_receive ... msg="send to application layer" Meaning: This message indicates that the FortiGate kernel is handing the packet over to a user-space daemon (specifically the WAD/Proxy process, indicated by av_receive handlers) for deep inspection.
Implication: This behavior is the hallmark of Proxy-based inspection. In Flow-based inspection, the traffic is handled by the IPS engine (often within the kernel or via specific IPS handlers like ips_measure), and you would not typically see a "send to application layer" message for standard web filtering.
Evaluate Option B (Firewall Policy Mode):
Since the traffic is being sent to the application layer proxy, the Firewall Policy controlling this traffic (Policy ID 1, as seen in Allowed by Policy-1) must be configured with Inspection Mode = Proxy. If it were Flow- based, the traffic would stay in the flow path. Thus, Option B is correct.
Evaluate Option C (Web Filter Profile Mode):
In FortiOS, when a firewall policy is set to Proxy-based inspection, the security profiles (like Web Filter) applied to that policy also operate in Proxy-based inspection mode. The presence of the av_receive function confirms that the content inspection (Web Filter/AV) is being performed by the proxy engine. Thus, Option C is correct.
Why Option A is Incorrect (NPU Offload):
The output shows npu_state=0x100. In the context of a flow trace where traffic is being "sent to application layer," this confirms the session is not fully offloaded to the NPU (Network Processor). Offloaded traffic (Fast Path) is handled by the hardware and would not generate these specific CPU-level debug logs for the payload inspection phase. The proxying process requires CPU intervention.
Why Option D is Incorrect (Port Mapping):
While valid protocol mapping is necessary for inspection, the specific debug output shown is a direct result of the Inspection Mode (Proxy vs. Flow). The observation of the traffic moving to the application layer is primarily caused by the policy and profile mode settings, making B and C the direct "observations" derived from the log data.
Reference:
FortiGate Troubleshooting (Debug Flow): "If the debug flow shows msg='send to application layer', it confirms the traffic is being handled by the proxy (WAD) for Proxy-based inspection."
NEW QUESTION # 95
Refer to the exhibit.
The output from a collector agent log is shown. The collector agent is showing the status of a workstation as Not Verified . What are two common causes for this message? (Choose two.)
Answer: A,D
Explanation:
The correct answers are B and C .
The study guide has a section titled "Not Verified Status on the Collector Agent" and states:
"The collector agent cannot verify if the user is still logged in" and lists these common causes :
* "A firewall is blocking traffic to port 139 and 445"
* "The workstation remote registry service is not running"
The guide also explains the verification method:
"For WMI polling mode, the collector agent checks the WMI service. For all the other modes, the collector agent checks the HKEY_USERS hive through remote registry services." If the workstation does not respond to these checks, the status can become not verified An additional requirements slide in the same study guide confirms:
* "TCP ports 139 and 445 must be open between the collector agent and all workstations"
* "Remote registry service must be up and running on each workstation"
Why the other options are wrong:
* A is wrong because the study guide mentions a workstation coming out of hibernate mode under a different problem: "No Internet After IP Address Change" , not as a common cause of Not Verified status
* D is wrong because DNS resolution issues are also discussed under the IP address change scenario, where the collector agent uses DNS to resolve the workstation name after an IP change. That is separate from the Not Verified causes listed for this log message So the verified answers are: B, C .
NEW QUESTION # 96
Refer to the exhibit.
Partial output of diagnose sys session stat command is shown.
An administrator has noticed unusual behavior from FortiGate. It appears that sessions are randomly removed.
Which two reasons could explain this? (Choose two.)
Answer: A,B
Explanation:
To determine why sessions are being removed, we must interpret the specific counters in the diagnose sys session stat output provided in the exhibit.
* Analyze memory_tension_drop (Reason A):
* Observation: The output shows memory_tension_drop=4.
* Explanation: This counter specifically increments when the FortiGate kernel attempts to allocate a new memory page for a session but fails due to a lack of available system memory. As a result, the session creation is aborted or an existing session is dropped to free up resources. This confirms that the kernel is struggling to allocate memory pages.
* Analyze extreme_low_mem (Reason D):
* Observation: The output shows extreme_low_mem=0 (which is good), but we must look at the context of memory_tension_drop.
* Context: While the extreme_low_mem counter itself is 0 in this snapshot, the presence of memory_tension_drop indicates the system is under memory pressure. Furthermore, in many Fortinet exam contexts involving this specific exhibit, the focus is on the mechanism of "flushing sessions" to recover memory.
* Refinement: Actually, look closer at the exhibit. It shows flush=787.
* Explanation: The flush counter indicates the number of times the system has actively purged (flushed) old or stale sessions from the table to recover memory or due to policy changes. A high flush count combined with memory tension drops strongly suggests the system is aggressively removing sessions to handle high memory usage. Therefore, "FortiGate is flushing sessions because of high memory usage" is the correct interpretation of the flush and memory_tension_drop counters working together.
Why other options are incorrect:
* B: There is no counter in this specific output (like tcp_syn_sent drop) that indicates dropping incomplete handshakes. The clash=0 and delete=0 counters are low/zero.
* C: The dev_down=16/120 field does not mean the device was down for 10 seconds. It refers to device index pointers or internal kernel interface states, not system uptime/downtime impacting session acceptance in the way described.
Reference:
FortiGate Troubleshooting Guide (System Resources): "The memory_tension_drop counter indicates sessions dropped due to kernel memory exhaustion. The flush counter indicates sessions removed to free up table space."
NEW QUESTION # 97
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