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很多準備參加Fortinet FCSS_NST_SE-7.6 認證考試的考生在網上也許看到了很多網站也線上提供有關Fortinet FCSS_NST_SE-7.6 認證考試的資源。但是我們的VCESoft是唯一一家由頂尖行業專家研究的參考材料研究出來的考試練習題和答案的網站。我們的資料能確保你第一次參加Fortinet FCSS_NST_SE-7.6 認證考試就可以順利通過。
問題 #47
Refer to the exhibit showing a debug output.
An administrator deployed FSSO in DC Agent Mode but FSSO is failing on FortiGate. Pinging FortiGate from where the collector agent is deployed is successful.
The administrator then produces the debug output shown in the exhibit.
What could be causing this error message?
答案：D
問題 #48
Refer to the exhibit.
FortiGate is showing continuous high CPU usage During a maintenance window, the CLI command diagnose sys top displays the output shown in the exhibit. The CLI command diagnose twat application ipsmonitor 5 was run. but the CPU usage by daemon ipsengine did not drop Which immediate action can you take to reduce the CPU usage effectively?
答案：B
解題說明：
To solve this high CPU usage scenario involving the ipsengine, we must understand the specific functions of the diagnose test application ipsmonitor commands shown in the troubleshooting steps.
Analyze the Situation:
Exhibit: The diagnose sys top output shows the ipsengine process is in a run state (R) consuming 99% CPU.
Previous Action: The administrator already ran diagnose test application ipsmonitor 5.
Result: The CPU usage did not drop.
Understand the Commands:
diagnose test application ipsmonitor 5: This command toggles IPS Bypass Mode. When enabled, the IPS engine lets traffic pass through without inspection.
Implication: If the CPU was high due to traffic volume, enabling bypass would drop the CPU load immediately.
Failure: Since the CPU remained at 99% after bypass, the ipsengine process is likely frozen, stuck, or in an internal infinite loop unrelated to the current traffic flow. The process itself is the problem, not the traffic volume.
Evaluate the Solution (Option B):
diagnose test application ipsmonitor 2: This command toggles the IPS engine ' s Enable/Disable status.
Because the engine is stuck (bypass failed to relieve pressure), the " Immediate action " required is to stop or restart the process entirely.
Running option 2 effectively disables/kills the stuck IPS engine instance, which will immediately drop the CPU usage to near zero. (It can then be toggled again to restart it).
Why other options are incorrect:
A (Reduce signatures): This is a tuning measure for normal operation, not an immediate fix for a stuck process at 99% CPU.
C (Disable IPS on policies): This is a configuration change that takes time and requires a commit; it is not the most immediate diagnostic tool available.
D (Bypass all IPS engines): This describes the action of command 5 (Bypass), which the prompt explicitly states was already performed and failed.
Reference:
FortiGate Security 7.6 Study Guide (IPS & Diagnostics): " Troubleshooting IPS high CPU: 1. Check top. 2.
Try bypass (ipsmonitor 5). 3. If CPU persists, restart the engine (ipsmonitor 99 or 2). "
問題 #49
Refer to the exhibit.
An administrator has configured a firewall policy to use proxy-based inspection mode. What could explain the messages observed in the debug flow output?
答案：D
解題說明：
The correct answer is A.
The debug flow shows:
traffic is going to TCP port 211
FortiGate logs run helper-ftp(dir=original)
The study guide explains exactly what that message means:
"In this example, the run helper-ftp message indicates that the FTP session helper is being used." Under normal proxy-based inspection, protocol handling is controlled by Protocol Options. The FortiOS administration guide states:
"Protocol port mapping only works with proxy-based inspection." and "The ports can be modified to inspect any port with flowing traffic." So if the policy is configured for proxy-based inspection but the debug still shows the FTP session helper on port 211, the most likely explanation is that the FTP protocol mapping in Protocol Options is broad enough to match unexpectedly, such as being mapped to Any. That would cause FortiGate to identify the traffic as FTP and invoke the helper.
Why the other options are wrong:
B is wrong because SSL deep inspection is unrelated to this debug. The traffic shown is plain TCP/211, and the key message is about the FTP helper, not SSL decryption.
C is wrong because if FTP had not been mapped to port 211, FortiGate would be less likely to treat this traffic as FTP. The observed run helper-ftp indicates FTP handling is being triggered.
D is wrong because low-memory conserve behavior would typically cause inspection bypass or blocking behavior, not specifically the run helper-ftp message. The study guide's helper example ties this message to session-helper use, not memory shortage.
So the verified answer is: A.
問題 #50
Refer to the exhibit, which shows the partial output of a diagnose command.
Which two conclusions can you draw from the output shown in the exhibit? (Choose two.)
答案：A,B
解題說明：
The study guide identifies this exact output as an expectation session created by the FTP session helper:
"run helper-ftp" indicates the FTP helper is in use.
"FortiGate created an expectation session and opened the pinhole port for the expected return traffic" It also explains why this exists:
"Another important function of the session helper is to temporarily create an expected session (or pinhole) for the data channel connection that comes from the server."
"The session helper automatically creates the session and opens the door for the incoming connection."
"These incoming TCP sessions use random TCP port numbers."
That directly proves C is correct.
For A, the exhibit shows expire=23. The study guide explains the expire field as the length of time until the session expires if no matching traffic arrives, and the FortiOS guide states for expectation sessions:
"Expectation sessions usually have a timeout value of 30 seconds. If the communication from the server is not initiated within 30 seconds the expectation session times out and traffic will be denied." So with expire=23, FortiGate will allow that expected traffic only for the remaining 23 seconds; after that, it times out and the traffic is denied. That makes A correct.
Why the other options are wrong:
B is not supported. The study guide describes expectation sessions as being created by the session helper from the control-session negotiation, not as independent objects unaffected by the master session.
D is wrong as stated. Even though the output contains policy_id=25, the study guide explicitly says the incoming expected connection is allowed by the expected session itself, "even when no firewall policy allows it."
問題 #51
What can cause an IKEv2 tunnel to go down after it was initially brought up successfully?
答案：B
解題說明：
The correct answer is D.
The study guide explains that IKEv2 has two initial exchanges:
IKE_SA_INIT
IKE_AUTH
and then later exchanges such as:
CREATE_CHILD_SA
It also states the roles of those exchanges:
IKE_SA_INIT negotiates the security settings for IKE traffic
IKE_AUTH performs mutual authentication and sets up the piggyback child SA CREATE_CHILD_SA creates a new child SA or rekeys an existing child SA Most importantly, the study guide explicitly says:
"By IKEv2 design, no Diffie-Hellman public key is exchanged during an IKE_AUTH exchange. Consequently, any phase 2 Diffie-Hellman group configuration mismatch between FortiGate and the peer is experienced only during the first rekey (CREATE_CHILD_SA exchange) of the child SA created during IKE_AUTH." This proves the key idea behind the question: an IKEv2 tunnel can come up successfully first, then fail later during a CREATE_CHILD_SA rekey/renegotiation event because of a phase 2 mismatch. Among the provided options, the matching later-stage cause is mismatched quick-mode selectors during CREATE_CHILD_SA.
Why the other options are wrong:
A is wrong because if the proposal mismatch were in the initial negotiation path, the tunnel would fail during establishment, not after it was already up. The study guide places initial tunnel establishment in IKE_SA_INIT and IKE_AUTH B is wrong because a mismatch in IKE_SA_INIT affects the initial establishment stage, not a tunnel that was already brought up successfully C is wrong because a pre-shared key mismatch is part of authentication during IKE_AUTH, so the tunnel would not come up successfully in the first place
問題 #52
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FCSS_NST_SE-7.6考題寶典: https://www.vcesoft.com/FCSS_NST_SE-7.6-pdf.html
從Google Drive中免費下載最新的VCESoft FCSS_NST_SE-7.6 PDF版考試題庫：https://drive.google.com/open?id=1AHvBPxJM5GinqLlTKaIXm-5hLBMpwOA1