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| Certification Vendor: | Fortinet |
|---|---|
| Exam Name: | Fortinet FCSS - Network Security 7.6 Support Engineer |
| Exam Number: | FCSS_NST_SE-7.6 |
| Exam Price: | $200 USD (excluding taxes) |
| Exam Format: | Scenario-based questions, Multiple Choice, Multiple Select |
| Available Languages: | English |
| Exam Duration: | 75 minutes |
| Related Certifications: | FCSS - LAN Edge 7.6 Architect FCSS - SD-WAN 7.6 Architect FCSS - Enterprise Firewall 7.6 Administrator |
| Certificate Validity Period: | 2 years |
| Passing Score: | Not publicly disclosed (Pass/Fail result) |
| Real Exam Qty: | 40 (range: 35–45) |
| Recommended Training: | Fortinet NSE 6 - Network Security Support Engineer Course FortiOS 7.6 Administration and Troubleshooting |
| 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 # 74
Refer to the exhibit.
Partial output of diagnose sys session stat command is shown.
An administrator has noticed unusual behavior from FortiGate. It appears that sessions are randomly removed. Which two reasons could explain this? (Choose two.)
Answer: A,D
Explanation:
To determine why sessions are being removed, we must interpret the specific counters in the diagnose sys session stat output provided in the exhibit.
Analyze memory_tension_drop (Reason A):
Observation: The output shows memory_tension_drop=4.
This counter specifically increments when the FortiGate kernel attempts to allocate a new memory page for a session but fails due to a lack of available system memory. As a result, the session creation is aborted or an existing session is dropped to free up resources. This confirms that the kernel is struggling to allocate memory pages.
Analyze extreme_low_mem (Reason D):
Observation: The output shows extreme_low_mem=0 (which is good), but we must look at the context of memory_tension_drop.
Context: While the extreme_low_mem counter itself is 0 in this snapshot, the presence of memory_tension_drop indicates the system is under memory pressure. Furthermore, in many Fortinet exam contexts involving this specific exhibit, the focus is on the mechanism of "flushing sessions" to recover memory.
Refinement: Actually, look closer at the exhibit. It shows flush=787.
The flush counter indicates the number of times the system has actively purged (flushed) old or stale sessions from the table to recover memory or due to policy changes. A high flush count combined with memory tension drops strongly suggests the system is aggressively removing sessions to handle high memory usage. Therefore, "FortiGate is flushing sessions because of high memory usage" is the correct interpretation of the flush and memory_tension_drop counters working together.
Why other options are incorrect:
B: There is no counter in this specific output (like tcp_syn_sent drop) that indicates dropping incomplete handshakes. The clash=0 and delete=0 counters are low/zero.
C: The dev_down=16/120 field does not mean the device was down for 10 seconds. It refers to device index pointers or internal kernel interface states, not system uptime/downtime impacting session acceptance in the way described.
Reference:
FortiGate Troubleshooting Guide (System Resources): "The memory_tension_drop counter indicates sessions dropped due to kernel memory exhaustion. The flush counter indicates sessions removed to free up table space."
NEW QUESTION # 75
Refer to the exhibit.
Partial output of command diagnose debug rating is shown. Which FDS server will the FortiGate algorithm choose?
Answer: D
Explanation:
The correct answer is C. 64.26.151.37.
The study guide explains the FortiGuard flags shown by diagnose debug rating:
D = Default
I = Initial
T = Timing
F = Failed
and specifically: "F = The server is down"
So even though 121.111.236.179 has the lowest RTT in the exhibit, it has the F flag, meaning FortiGate considers that server failed/down, so it will not be chosen.
To determine which active server is selected, the FortiOS administration guide states:
"The server list is sorted first by weight. The server with the smallest RTT appears at the top of the list regardless of weight. ... Therefore the top position in the list is selected based on RTT while the other positions are based on weight." Among the valid, non-failed choices in the exhibit:
64.26.151.37 → RTT 45
209.22.147.36 → RTT 103
96.45.33.65 → RTT 144
208.91.112.194 → RTT 107
The active server with the lowest RTT is 64.26.151.37, so that is the server FortiGate will choose.
So the verified answer is: C.
NEW QUESTION # 76
Refer to the exhibit.
Which route will traffic take to get to the 100.65.0.0/24 network considering the routes are all configured with the same distance?
Answer: B
Explanation:
To determine the path the traffic will take, we must look at the FortiGate Route Lookup Precedence (Packet Processing Flow) and the specific configurations shown in the exhibit
* Analyze the Routing Precedence:
* In FortiOS, when a packet arrives (and is not part of an existing session), the FortiGate performs route lookups in a specific order:
* Policy Routes: Configured under config router policy (or diagnose firewall proute list).
These are checked first. If a packet matches the criteria (Source, Destination, Protocol, Incoming Interface), the Policy Route is used immediately, bypassing the standard routing table.
* FIB (Forwarding Information Base): If no Policy Route matches, the device looks at the standard routing table (Static, Connected, Dynamic).
* Analyze the Exhibit:
* Policy Route Section: The output of diagnose firewall proute list shows an active policy route ( id=1).
* Destination: 100.65.0.0/255.255.255.0 (Matches the network in the question).
* Action: It directs traffic to gateway 10.0.4.253 via oif=6(port4).
* Routing Table Section: The output of get router info routing-table database shows multiple routes for 100.65.0.0/24 (Static, OSPF, BGP) all with distance 10. The Static route (S) is currently selected (*>) in the FIB.
* Conclusion:
* Because Policy Routes take precedence over the standard routing table (FIB), the FortiGate will forward the traffic using the instructions in Policy Route ID 1. It will not use the Static, BGP, or OSPF routes visible in the routing table for any traffic that matches the policy route's criteria (ingress port 3).
Reference:
FortiGate Security 7.6 Study Guide (Routing): "Policy routes take precedence over entries in the routing table. If a packet matches a policy route, the FortiGate routes the packet according to the specified interface and gateway."
NEW QUESTION # 77
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: D
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 # 78
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 # 79
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