Exam FCSS_NST_SE-7.6 Tests & New FCSS_NST_SE-7.6 Exam Notes

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Fortinet FCSS_NST_SE-7.6 Exam Syllabus Topics:

SectionObjectives
Topic 1: VPNs- Troubleshoot IPsec IKE version 1 and 2
Topic 2: FortiAnalyzer- Troubleshoot logs and reports
- Troubleshoot device and communication issues
Topic 3: FortiManager- Troubleshoot policy and object management
- Troubleshoot FortiManager HA
- Troubleshoot device-level and ADOM-level issues
Topic 4: System Troubleshooting- Troubleshoot automation stitches
- Troubleshoot connectivity problems using built-in tools
- Troubleshoot Security Fabric and FortiOS connectivity
- Troubleshoot resource problems using built-in tools
- Troubleshoot HA
Topic 5: Security Profiles- Troubleshoot FortiGuard issues
- Troubleshoot web filtering issues
- Troubleshoot the intrusion prevention system (IPS)
Topic 6: Routing- Troubleshoot routing packets using static routes, policy routes, and OSPF
Topic 7: Authentication- Troubleshoot Fortinet Single Sign-On (FSSO)
- Troubleshoot local and remote authentication

>> Exam FCSS_NST_SE-7.6 Tests <<

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Fortinet FCSS - Network Security 7.6 Support Engineer Sample Questions (Q64-Q69):

NEW QUESTION # 64
Refer to the exhibit, which shows the output of a policy route table entry.

Which type of policy route does the output show?

Answer: D

Explanation:
The exhibit for question 4 shows a policy route table entry, and key fields are as follows:
internet service(1) : Fortinet-FortiGuard(1245324,0.0.0.0,0.0.0.0)
According to the Fortinet official documentation, when a policy route is based on Internet Service Database (ISDB) entries, the route entry will specifically mention "internet service," showing the service being referenced (in this example, Fortinet-FortiGuard). This is fundamentally different from a regular policy route, which is defined by source, destination, and service wildcards without referencing an ISDB signature. A regular policy route's output would not contain the line "internet service." Policy routes that use ISDB allow FortiGate to steer traffic for specific well-known services (like FortiGuard, Google, Microsoft) based on traffic pattern recognition, even if the destination IP is dynamic. The matching and route selection follow the ISDB tag and can coexist with static or regular policy routes.
Thus, this entry is correctly and uniquely an ISDB route, as explained in the FortiOS policy routing documentation and ISDB configuration references.
References:
FortiOS Administration Guide: Policy Routing, ISDB integration and interpretation of route table entries ISDB-based Routing and Official CLI Outputs in Fortinet's documentation


NEW QUESTION # 65
What can cause an IKEv2 tunnel to go down after it was initially brought up successfully?

Answer: C

Explanation:
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


NEW QUESTION # 66
Refer to the exhibit, which shows the output of diagnose sys session list.

If the HA ID for the primary device is 0, what happens if the primary fails and the secondary becomes the primary?

Answer: B


NEW QUESTION # 67
Refer to the exhibit, which shows a session entry.

Which statement about this session is true?

Answer: C

Explanation:
The session output reveals a session with proto=1 (ICMP) and the origin and reply directions show address and NAT translations. Specifically, the hook=post dir=org act=snat shows that source NAT is performed for outgoing packets, where the source 10.1.10.10:40602 is translated to 10.200.5.1:8 (likely ICMP id 8, not a TCP/UDP port). The reply direction, hook=pre dir=reply act=dnat, indicates destination NAT for incoming packets: packets incoming for 10.200.5.1:60430 are destination-NATed to 10.1.10.10:40602. The gateway (gwy) is listed as 10.200.1.254/10.1.0.1, which for outgoing traffic means that return traffic is directed to the gateway (10.200.1.254), per the NAT policy. This is confirmed by the FortiOS Session Table Guide, which explains that the returned ICMP reply will be routed out to this NAT gateway. The session statistics and logical flow (SNAT out, matching DNAT in) reinforce that reply traffic to the initiator traverses via
10.200.1.254.
References:
FortiOS Administration Guide: Session Table, NAT, and Route Interaction Fortinet Technical Note: Diagnose sys session list, Direction and NAT Analysis


NEW QUESTION # 68
Refer to the exhibit, which shows the omitted output of a session table entry.

Which two statements are true? (Choose two.)

Answer: A,B

Explanation:
In the provided session table output, the following details justify the answers:
Policy ID Match: The line policy_id=1 directly confirms that this session was matched by Firewall Policy ID
1. According to Fortinet's session table documentation, the policy_id field always references the policy that allowed this session, so this is a clear indicator.
Session Offloading: The presence of the strings npu_state, ips_offload, and notably the NPU info section such as offload=8/8, ips_offload=1/1 shows that this session has been offloaded to the Network Processor Unit (NPU). Fortinet technical documentation states that "offload" values greater than zero in both directions (and an NPU info section) affirm that NPU hardware processing (fast path) is handling this traffic, thus the session is not being handled in software only.
Other options:
VLAN Tagging (vlan=0x0000/0x0000): This means no VLAN tag is assigned to this session.
NP7: The actual NPU model handling the session isn't exposed in this snippet-the offload parameters shown are generic and not specific to NP7 hardware, so it cannot be concluded from the session data.
References:
Fortinet Technical Tip: FortiGate Session Table and NPU Offloading
FortiOS Diagnostics Guide: Policy ID, Offload, and VLAN Session Table Fields


NEW QUESTION # 69
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