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Fortinet FCSS_NST_SE-7.6 Exam Syllabus Topics:

TopicDetails
Topic 1
  • System troubleshooting: This section of the exam measures the skills of Network Security Support Engineers and addresses diagnosing and correcting issues within Security Fabric setups, automation stitches, resource utilization, general connectivity, and different operation modes in FortiGate HA clusters. Candidates work with built-in tools to effectively find and resolve faults.
Topic 2
  • Authentication: This section evaluates the abilities of System Administrators and requires troubleshooting both local and remote authentication methods, including resolving Fortinet Single Sign-On (FSSO) problems for secure network access.
Topic 3
  • Security profiles: This part measures skills of Security Operations Specialists and covers identifying and resolving problems linked to FortiGuard services, web filtering configurations, and intrusion prevention systems to maintain protection across network environments.
Topic 4
  • Routing: This section focuses on Network Engineers and involves tackling issues related to packet routing using static routes, as well as OSPF and BGP protocols to support enterprise network traffic flow.
Topic 5
  • VPN: This section is aimed at IT Professionals and includes diagnosing and addressing issues with IPsec VPNs, specifically IKE version 1 and 2, to secure remote and site-to-site connections within the network infrastructure.

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Fortinet FCSS - Network Security 7.6 Support Engineer Sample Questions (Q25-Q30):

NEW QUESTION # 25
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 # 26
Refer to the exhibit, which shows partial outputs from two routing debug commands.

Why is the port2 default route not in the second command output?

Answer: B

Explanation:
The correct answer is D .
In the exhibit, get router info routing-table database shows both static default routes:
* 0.0.0.0/0 [20/0] via 100.64.2.254, port2
* 0.0.0.0/0 [10/0] via 100.64.1.254, port1
But get router info routing-table all shows only:
* 0.0.0.0/0 [10/0] via 100.64.1.254, port1
The study guide explains that get router info routing-table all displays the routes that make it to the FIB
- the best active routes . It also says that this command doesn't show standby or inactive routes , which can remain only in the routing table database. It gives the exact rule: "when two static routes to the same destination subnet have different distances, the one with the lower distance is installed in the routing table, and the one with the higher distance is installed in the routing table database." The study guide also shows the route selection process:
* Most specific route
* Lowest distance
* Lowest metric (dynamic routes)
* Lowest priority (static routes)
* ECMP
So the port2 default route is absent from the second output because its distance is 20 , while the port1 default route has distance 10 . The lower-distance route is installed in the active routing table/FIB.
Why the other options are wrong:
* A is wrong because the exhibit does not indicate port2 is down or disabled.
* B and C are wrong because priority is checked only after distance for static routes. Here, the routes already differ by distance , so priority is not the deciding factor.
So the verified answer is: D .


NEW QUESTION # 27
Which two protocol states indicate that traffic is bidirectional? (Choose two.)

Answer: B,D

Explanation:
The correct answers are A and B.
For UDP, the study guide states this directly: "For UDP, the session state can have only two values: 00 when traffic is only one way, and 01 when traffic is two ways. For ICMP, the protocol state is always 00." That makes B correct and D incorrect.
For TCP, the study guide explains that the protocol state is a two-digit number, where the first digit is the server-side state and the second digit is the client-side state. It also states that the first digit is 0 when the session is not subject to any inspection, and the TCP state table shows that value 1 = ESTABLISHED So, for a normal non-proxied/non-inspected TCP session, proto_state=01 means the TCP session is in the ESTABLISHED state. An established TCP session means the three-way handshake has completed, which requires traffic in both directions. That is why A is correct.
The study guide also says: "proto_state=11 means that the TCP three-way handshake for both server-side and client-side is completed (ESTABLISHED)." This confirms that TCP state value 1 represents an established state.
Why C is not selected: the study guide defines value 5 as TIME_WAIT and says: "When a session is closed by both the sender and receiver, FortiGate keeps that session in the session table for a few seconds... This is the state value 5." So proto_state=05 represents a closing/closed TCP session in TIME_WAIT, not the normal bidirectional state the question is testing.
Therefore, the verified answers are A and B.


NEW QUESTION # 28
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,C

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 # 29
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 # 30
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