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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Exam Format: | Scenario-based questions, Multiple-choice questions |
| Available Languages: | English |
| Related Certifications: | Fortinet Certified Professional (FCP) - Network Security Fortinet NSE 4 Network Security Professional (legacy equivalent) |
| Recommended Training: | Fortinet Network Security Training |
| Exam Registration: | Fortinet Training Institute Certification Portal |
| Sample Questions: | Fortinet FCSS_NST_SE-7.6 Sample Questions |
| Exam Way: | Online proctored exam via Fortinet certification platform or authorized testing delivery systems. |
| Pre Condition: | Recommended: Fortinet Certified Professional (FCP) - Network Security or equivalent practical experience with FortiGate firewalls. |
| Official Syllabus URL: | https://training.fortinet.com |
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NEW QUESTION # 18
What are two reasons you might see iprope_in_check() check failed, drop when using the debug flow?
(Choose two.)
Answer: B,D
Explanation:
The Network Security Support Engineer 7.6 Study Guide explicitly explains this debug message:
"iprope_in_check() check failed, drop" means the packet is destined to a FortiGate IP address and one of these conditions applies:
* The service is not enabled
* The service is using a different TCP port
* The source IP address is not included in the trusted host list
* The packet matches a local-in policy with action deny
That directly confirms C. Trusted host list misconfiguration .
Why D is the second valid choice:
The FortiOS administration guide explains that:
"IP pools and VIPs are considered local IP addresses if responding to ARP requests on these external IP addresses is enabled ... the FortiGate is considered a destination for those IP addresses ... once an IP pool or VIP has been configured ... the FortiGate considers it as a local address and will not forward traffic based on the routing table." Because iprope_in_check() is a local-in/local-destination type failure, a VIP or IP pool misconfiguration can cause traffic to be treated as destined for the FortiGate itself, which can then trigger this drop condition if the matching local service/local-in handling is not valid. So D is the closest supported second answer from the available choices.
Why the other options are wrong:
* A is wrong because policy route problems are not the documented meaning of this specific debug message. The study guide instead ties iprope_in_check() check failed, drop to management/local-in conditions.
* B is wrong because the study guide says traffic shaping drops appear as: "Denied by quota check"
NEW QUESTION # 19
In which two slates is a given session categorized as ephemeral? (Choose two.)
Answer: C,D
Explanation:
The study guide states:
"FortiGate categorizes an entry in the session table as an ephemeral session when it is a TCP session that is not fully established (three-way handshake not completed), or when it is a UDP session with only one packet received." This directly proves:
A is correct because a UDP session with only one packet received is ephemeral.
C is correct because a TCP session waiting for the SYN/ACK is not fully established, so it is ephemeral. The study guide's TCP state table shows that the handshake is only completed when the session reaches ESTABLISHED Why the other options are wrong:
B is wrong because once UDP traffic has been seen in both directions, it is no longer the "single packet received" condition described for ephemeral sessions. The study guide says for UDP: 00 = one way, 01 = both ways D is wrong because a TCP session waiting for FIN/ACK is already in the closing stage after establishment, not in the "not fully established" stage. The study guide explains that after both sides close the session, FortiGate can keep it briefly in the table in state value 5 for out-of-order packets after FIN/ACK
NEW QUESTION # 20
Which Iwo actions does FortiGate take after an administrator enables the auxiliary session selling? (Choose two.)
Answer: C,D
Explanation:
When the "auxiliary session" setting is enabled (typically via config system npu or implicitly for ECMP on NP6/NP7 processors), the FortiGate alters how it manages sessions to support hardware offloading for traffic that might switch interfaces (like ECMP or SD-WAN).
B). FortiGate accelerates all ECMP traffic to the NP6 processor:
The primary purpose of enabling auxiliary sessions is to ensure that ECMP traffic can be fully offloaded (accelerated) by the NPU. Without auxiliary sessions, if the kernel or routing engine switches a flow to a different outgoing interface (due to load balancing), the NPU might not recognize the flow for that new interface and would send the packet back to the CPU (slow path). Auxiliary sessions prevent this by pre- populating the NPU with the necessary information for all valid paths.
D). FortiGate creates two sessions in case of a routing change:
Technically, the FortiGate creates the primary session (for the currently selected path) and an auxiliary session (for the alternative path). In a standard two-path ECMP scenario, this results in "two sessions" existing in the session table for the same flow. This ensures that if a routing change occurs (e.g., the flow shifts to the second path), the traffic continues to be processed by the NPU without interruption or re- evaluation by the CPU.
NEW QUESTION # 21
Refer to the exhibits.
An OSPF peer is advertising route 172.16.52.0/24. The local FortiGate is configured with an inbound distribution list that allows the 172.16.0.0/16 network to be injected into its routing table. However, the
1'2.16.52.0/24 subnet cannot be seen in the FIB.
Which two stops can the administrator of the local FortiGate take to ensure that the advertised 172.16. 52.0/24 subnet will be injected into the routing table? (Choose two.)
Answer: A,D
Explanation:
The issue is caused by the strict matching logic of the configured Prefix List.
Current State: The rule is edit 1 with set prefix 172.16.0.0 255.255.0.0 and both ge (greater than or equal) and le (less than or equal) are unset.
Behavior: When ge and le are unset, FortiOS requires an exact match of the subnet mask. The current rule only matches the exact network 172.16.0.0/16. It denies 172.16.52.0/24 because the mask (/24) does not match the rule's mask (/16).
To fix this and inject 172.16.52.0/24, you must modify the list to match the /24 mask:
A). Add another entry to the prefix list to specifically allow the 172.16.52.0/24 network:
Creating a new rule (e.g., edit 2) with set prefix 172.16.52.0 255.255.255.0 will provide an exact match for the incoming route, allowing it to pass the distribute-list.
B). Change the ge value to 17:
By configuring set ge 17 on the existing rule (conceptually 172.16.0.0/16 ge 17), you change the logic from
"exact match" to "range match".
This configuration tells the router to match any prefix starting with 172.16.x.x that has a subnet mask length of 17 or greater.
Since the incoming route is a /24, and 24 is greater than 17, the route will match the prefix list and be accepted.
Why other options are incorrect:
C: The option text appears to read "Change the ... value to 16". If this refers to le 16, it would enforce the mask to be exactly /16 or less, which still excludes /24.
D: Changing the default behavior to implicit allow defeats the purpose of a filter (security control) and is not a standard configuration step for fixing a single missing route.
Reference:
FortiGate Security 7.6 Study Guide (Routing): "In prefix-lists, if ge and le are not used, the subnet mask must match exactly. To match subnets within a range, you must define the prefix length boundaries using ge or le."
NEW QUESTION # 22
Refer to the exhibit, which shows the output of a diagnose command. What can you conclude from the RTT value?
Answer: C
Explanation:
The correct answer is A .
The study guide explicitly explains the diagnose debug rating table and says that for each server IP, the output shows "The round trip delay" That means the RTT value represents the time it takes for FortiGate to send a request and receive the reply from that FortiGuard server.
The FortiOS administration guide also confirms this by stating:
"Each server is probed for Round Trip Time (RTT) every two minutes."
Why the other options are wrong:
* B is wrong because packet loss is shown separately by Curr Lost and Total Lost , while RTT is the round-trip delay
* C is wrong because license-validation behavior is indicated by flags such as I = Initial , not by the RTT value itself
* D is wrong because the documents do not say RTT starts at a fixed value of 10; it is measured dynamically as round-trip delay So the verified answer is: A .
NEW QUESTION # 23
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