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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Available Languages: | Japanese, English |
| Exam Format: | Multiple-choice |
| Real Exam Qty: | 40 |
| Exam Price: | USD 200 |
| Certificate Validity Period: | 2 years |
| Exam Duration: | 75 minutes |
| Passing Score: | Pass/Fail (No specific score published) |
| Related Certifications: | FCSS in Network Security |
| 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 # 51
Refer to the exhibit, which shows a partial output of a real-time LDAP debug.
What two conclusions can you draw from the output? (Choose two.)
Answer: C,D
Explanation:
The exhibit includes these key debug lines:
start_search_dn-base:'DC=TAC,DC=ottawa,DC=fortinet,DC=com' filter:sAMAccountName=jsmith get_all_dn-Found DN 1:CN=John Smith,CN=Users,DC=TAC,DC=ottawa,DC=fortinet,DC=com The study guide explains that in regular bind, LDAP authentication has four steps, and that during step 2, FortiGate searches the LDAP tree to find the user's DN:
"During the second step, FortiGate does a search query in the LDAP database to find the user's location-in other words, the user's DN. If the user is found, the server replies with the user's DN." It also states for the real-time debug of step 2:
"An fnbamd_ldap_build_dn_search_req-base message indicates that FortiGate is performing step two: searching for the user in the LDAP tree. This message includes the base branch (distinguished name setting) and the name of the attribute used to locate the user... If the LDAP server finds the user, the output shows the user's full DN." That directly proves:
D is correct because the debug is showing step 2: Search Request
A is correct because the base DN and found DN are under DC=TAC,DC=ottawa,DC=fortinet,DC=com, which corresponds to the LDAP domain/tree root TAC.ottawa.fortinet.com Why the other options are wrong:
B is wrong because binding with the user's credentials is step 3, not the step shown here. The study guide says: "Step 3 - Bind user credentials" and shows that this happens later with fnbamd_ldap_build_userbind_req / __ldap_build_bind_req-Binding to 'CN=John Smith...' C is wrong because collecting user group information is step 4, not the step shown in the exhibit. The study guide says: "The last step is to get the user group information" and shows step 4 with Attr query / memberOf search
NEW QUESTION # 52
Refer to the exhibit.
A partial output from an IKE real-time debug is shown
The administrator does not have access to (he remote gateway
Based on the debug output, which two conclusions can you draw? (Choose two.)
Answer: A,D
Explanation:
To determine the correct conclusions, we analyze the specific lines in the IKE real-time debug output provided in the exhibit:
Analysis for Option A (The remote peer is the initiating peer):
Evidence: The very first line of the debug output reads: ike 0:624000:98: responder: main mode get 1st message...
The keyword responder indicates that this local FortiGate is receiving the connection request. Consequently, the remote peer must be the initiator sending the request. The phrase " get 1st message " confirms the local unit is receiving the initial packet of the negotiation sequence.
Conclusion: This statement is True.
Analysis for Option B (This is a phase 1 negotiation):
Evidence: The same line mentions main mode.
In IPsec VPNs, Main Mode and Aggressive Mode are exclusively used for Phase 1 (IKE SA) negotiations.
Phase 2 (Child SA) negotiations use Quick Mode. The presence of " main mode " definitively identifies this as a Phase 1 exchange.
Conclusion: This statement is True.
Analysis for Option C (There is a Diffie-Hellman group mismatch):
Evidence:
Incoming proposal (Remote): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14) in the first proposal proposal.
My proposal (Local): Lists type=OAKLEY_GROUP, val=MODP2048 (Group 14).
Since both the remote peer and the local gateway support and are proposing MODP2048 (Group 14), there is no Diffie-Hellman group mismatch. The actual mismatch visible in the logs is between the Encryption/Hash algorithms (Remote proposes AES-256/SHA2-256, while Local proposes AES-128/SHA), but the DH groups match.
Conclusion: This statement is False.
Analysis for Option D (This is a phase 2 negotiation):
As established in the analysis for Option B, " Main Mode " is a Phase 1 protocol. If this were Phase 2, the debug would show " Quick Mode " .
Conclusion: This statement is False.
Reference:
FortiGate Security 7.6 Study Guide (IPsec VPN): " Phase 1 modes: Main mode and Aggressive mode. " FortiOS Debugging documentation: Explains that " responder " indicates the device receiving the IKE initialization.
NEW QUESTION # 53
Refer to the exhibit.
An IPsec VPN tunnel using IKEv2 was brought up successfully, but when the tunnel rekey takes place the tunnel goes down.
The debug command for IKE was enabled and, in the exhibit, you can review the partial output of the debug IKE while attempting to bring the tunnel up.
What is causing. The tunnel to be down?
Answer: C
Explanation:
To determine the cause of the failure, we must analyze the IKEv2 debug output provided in the exhibit (image_ad3dc6.jpg):
Identify the Negotiation Phase:
The debug log shows: responder received CREATE_CHILD exchange.
In IKEv2, the CREATE_CHILD_SA exchange is used to create new Child SAs (Phase 2) or to rekey existing ones.
The fact that the tunnel was previously "brought up successfully" implies the initial IKE SA (Phase 1) is stable, and this error is occurring specifically during a rekey event, which often involves Perfect Forward Secrecy (PFS).
Analyze the Proposals (The Mismatch):
Incoming Proposal (Remote Peer):
The remote peer sends a proposal containing two Diffie-Hellman groups: type=DH_GROUP, val=MODP2048 (Group 14) and type=DH_GROUP, val=MODP1536 (Group 5).
My Proposal (Local FortiGate):
The local FortiGate configuration expects: type=DH_GROUP, val=MODP3072 (Group 15).
Result of the Negotiation:
The debug output concludes with: no proposal chosen and Negotiate SA Error.
This error occurs because the local FortiGate cannot find a common Diffie-Hellman group between what it requires (Group 15) and what the peer is offering (Groups 14 or 5).
While this is technically a mismatch occurring during the Phase 2 (Child SA) creation, "A Diffie-Hellman mismatch" (Option A) is the precise root cause identified in the logs.
Why other options are incorrect:
B: The log shows received create-child request, confirming that UDP traffic is reaching the device and is not blocked.
C: The failure is in the CREATE_CHILD exchange (Phase 2/Rekey), not the IKE_SA_INIT or IKE_AUTH (Phase 1) exchanges.
D: While the mismatch is occurring within the Phase 2 definitions, Option A is the specific technical reason for the no proposal chosen error shown in the DH_GROUP lines.
Reference:
FortiGate Security 7.6 Study Guide (IPsec VPN): "Phase 2 parameters... if Perfect Forward Secrecy (PFS) is enabled, a Diffie-Hellman exchange is performed again. Both peers must match the DH Group."
NEW QUESTION # 54
Refer to the exhibit.
The partial output of diagnose sys session stat command is shown.
Which statement about the output shown in the exhibit is correct?
Answer: B
Explanation:
The correct answer is C .
The exhibit shows:
* 562 in ESTABLISHED state
* 27 in CLOSE state
* memory_tension_drop=0
* ephemeral=0/131072
According to the study guide, for TCP sessions: "The protocol state in the session table is a two-digit number. For TCP, 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." The same page also shows that value 1 = ESTABLISHED So, if a TCP session is in ESTABLISHED state and there is no inspection , its proto_state is 01 :
* first digit 0 = no inspection
* second digit 1 = ESTABLISHED
That makes C correct. This is also consistent with FortiOS examples showing established TCP sessions with proto=6 proto_state=01 Why the other options are wrong:
* A is wrong because the field that indicates sessions dropped due to low free memory is memory_tension_drop, and in the exhibit it is 0 , not 113. The study guide states: "If there is a lack of free memory, the kernel deletes the oldest sessions. The command shown on this slide displays the number of sessions the kernel deleted because of this mechanism." So 113 is the clash value, not memory-tension drops.
* B is wrong because ephemeral=0/131072 does not mean 131072 ephemeral sessions were recorded.
The study guide explains that FortiGate "sets a hard limit on the maximum number of ephemeral sessions that can exist at the same time in the session table." Therefore:
* 0 = current ephemeral sessions
* 131072 = maximum allowed ephemeral sessions for that model/context
* D is wrong because the study guide says the temporary retention for possible out-of-order packets happens in state value 5 (TIME_WAIT) : "When a session is closed by both the sender and receiver, FortiGate keeps that session in the session table for a few seconds, to allow for any out- of-order packets that might arrive after the FIN/ACK packet. This is the state value 5." But the exhibit shows 27 in CLOSE state , and the same table shows CLOSE = 6 , not TIME_WAIT So the verified answer is C .
NEW QUESTION # 55
Exhibit.
Refer to the exhibit, which shows a partial output of diagnose hardware aysinfo memory.
Which two statements about the output are true? (Choose two.)
Answer: B,D
Explanation:
The partial output from diagnose hardware sysinfo memory provides details on system RAM allocation.
According to Fortinet ' s technical documentation for memory troubleshooting and Linux memory management (which FortiOS is based on):
MemFree is the portion of physical memory not currently allocated to any running process or kernel function.
Thus, 708880 kB is available and can be immediately used by user-space programs or system operations.
Inactive refers to pages in the memory cache that were previously in use for I/O or file system buffering but are now not actively referenced. These pages are retained in memory for quick access if needed again, but can be reclaimed for other memory operations if demand increases. The value 98908 kB here represents currently unused cache pages (inactive pages), ready for repurposing or deletion if the system requires more RAM.
Cached represents the total amount of system memory allocated to cache, which includes both active and inactive cache pages. It does not, by itself, represent I/O cache exclusively, nor does " inactive " mean memory "will never be used" as the kernel can re-purpose inactive pages on demand.
References:
Fortinet Technical Tip: Explaining the ' diagnose hard sysinfo memory ' command FortiOS System Administration Guide: Linux Memory Reporting, Cached and Inactive Statistics
NEW QUESTION # 56
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