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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | Fortinet FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Certificate Validity Period: | 2 years |
| Available Languages: | English |
| Real Exam Qty: | 40 (range: 35โ45) |
| Related Certifications: | FCSS - SD-WAN 7.6 Architect FCSS - LAN Edge 7.6 Architect FCSS - Enterprise Firewall 7.6 Administrator |
| Exam Duration: | 75 minutes |
| Exam Format: | Multiple Select, Multiple Choice, Scenario-based questions |
| Passing Score: | Not publicly disclosed (Pass/Fail result) |
| Exam Price: | $200 USD (excluding taxes) |
| 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 # 128
Refer to the exhibit.
The output of the command diagnose vpn tunnels liar is shown.
Which two statements accurately describe the status of the tunnel? (Choose two.)
Answer: A,C
Explanation:
Based on the Fortinet FCSS - Network Security 7.6 documents and the analysis of the VPN tunnel exhibit, here is the verified answer.
Questions no: 91
Verified Answer: A, C
Comprehensive and Detailed Explanation with all FCSS - Network Security 7.6 documents:
To determine the status of the VPN tunnel, we must examine the specific counters and fields in the diagnose vpn tunnel list output provided in the exhibit.
Analyze Phase 2 Status (Option A):
The output displays child_num=0.
In IKEv2 (and IKEv1 implementations in FortiOS), "Child SAs" refer to the Phase 2 (IPsec) Security Associations that carry the actual data traffic.
A value of 0 indicates that no Phase 2 tunnels are established. If Phase 2 were up, child_num would be at least
1.
Additionally, under the proxyid section, the field sa=0 confirms there is no active Security Association for that traffic selector.
Analyze Traffic Status (Option C):
The stat line shows: rxp=0 txp=0 rxb=0 txb=0.
rxp (Received Packets) and txp (Transmitted Packets) are both zero. This definitively confirms that no traffic is traversing the tunnel currently. This is expected since Phase 2 is down.
Analyze Phase 1 Status (Why B is incorrect):
The tunnel entry exists in the list with a valid tun_id, and NAT-Traversal is active (natt: mode=keepalive).
The presence of the tunnel in this command output, along with active Keepalive mechanisms, typically indicates that Phase 1 (IKE SA) is established and the peers are communicating on port 4500 (NAT-T), even though the data tunnels (Phase 2) failed to negotiate. If Phase 1 were down, the tunnel would often not appear in this "list" view or would show different status flags indicating a complete connection failure.
Conclusion: The exhibit shows a scenario where the Phase 1 control channel is likely up (evidenced by the entry existence and NATT keepalives), but the Phase 2 data channel is down (child_num=0), resulting in zero traffic flow (rxp=0/txp=0).
NEW QUESTION # 129
Refer to the exhibit.
Which two observations can you make about the web filter traffic captured using the flow tool? (Choose two.)
Answer: B,C
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 # 130
Refer to the exhibit.
Assuming a default configuration, which three statements are true? (Choose three.)
Answer: B,C,D
Explanation:
References:
Fortinet Technical Note: RPF Default Configuration and Routing Table Matching FortiGate Administration Guide: Routing and Asymmetric Routing Controls Community Knowledgebase: Route Lookups and RPF Enforcement on FortiOS
NEW QUESTION # 131
Refer to the exhibit, which shows the modified output of the routing kernel.
Which statement is true?
Answer: A
NEW QUESTION # 132
Refer to the exhibit.
The modified output of live routing kemel is shown
Which two statements about the output are (rue? (Choose two.)
Answer: C,D
Explanation:
We must analyze the flags (*, >, S, O, B) and Administrative Distances (AD) shown in the get router info routing-table database exhibit to determine the correct statements.
Analysis for Option A (The BGP route to 10.0.4.0/24 is not in the forwarding information base):
True. Look at the entry for 10.0.4.0/24.
There is an OSPF route: O *> 10.0.4.0/24 [110/2]. The * indicates it is in the FIB, and > indicates it is the selected route.
There is a BGP route: B 10.0.4.0/24 [200/10]. This line lacks the * flag.
Reason: The OSPF route has an Administrative Distance of 110. The BGP route (iBGP) has an AD of 200. Since 110 is lower than 200, OSPF wins, and the BGP route is not installed in the Forwarding Information Base (FIB).
Analysis for Option B (The default static route through 10.200.1.254 is in the forwarding information base):
True. Look at the 0.0.0.0/0 entries.
The first entry is S *> 0.0.0.0/0 [10/0] via 10.200.1.254.
The * flag confirms this specific route is installed in the FIB.
The second static route (via 10.200.2.254) has a higher distance ([20/0]) and no * flag, so it is inactive.
Why C is False: ECMP (Equal Cost Multi-Path) requires routes to have the same cost/priority. Here, one static route has AD 10 and the other has AD 20. They are not equal, so ECMP is not performed.
Why D is False: The routing table database shows active routes, not the raw Link State Advertisement (LSA) database. You cannot determine the number of LSAs received solely from this output.
Reference:
FortiGate Security 7.6 Study Guide (Routing): "The routing table database displays all known routes... The * indicates the route is in the FIB... Lower Administrative Distance is preferred."
NEW QUESTION # 133
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