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質問 # 71
Refer to the exhibit.
Partial output of a real-time OSPF debug is shown.
Which two reasons explain why the two FortiGate devices are unable to form an adjacency? (Choose two.)
正解：A、C
解説：
To determine the correct reasons for the adjacency failure, we must analyze the standard OSPF real-time debug output (diagnose ip router ospf all enable or diagnose sniffer packet) typically provided in this exam exhibit.
* Analyze the Debug Output:
* The debug output in this specific question scenario typically displays an incoming Hello packet line: OSPF: RECV[Hello]: ... auth-type 0 ...
* "RECV": Indicates the packet is coming from the Remote peer.
* "auth-type 0": Indicates the Remote peer is sending "Null" (No) authentication.
* Analyze the Failure:
* The adjacency fails because the Local FortiGate is rejecting this packet.
* If the Local FortiGate accepts "No Authentication", it would match auth-type 0 and form the adjacency.
* Since it is failing (and producing a debug log), the Local FortiGate must be expecting a different authentication type (Type 1 Cleartext or Type 2 MD5).
* Evaluate the Options:
* A. The remote peer has either OSPF cleartext or MD5 authentication configured.
* Incorrect. The debug shows auth-type 0 (No Auth) coming from the remote peer.
* B. There is an OSPF authentication configuration mismatch.
* Correct. One side is sending "No Auth" (Remote), and the other expects "Auth" (Local).
This is a definition of a mismatch.
* C. The local FortiGate does not have OSPF authentication configured.
* Incorrect. If the Local unit had "No Auth" configured, it would match the Remote's auth- type 0, and the adjacency would come up. The failure implies the Local unit does have auth configured.
* D. The local FortiGate has either OSPF cleartext or MD5 authentication configured.
* Correct. Because the Local unit is rejecting the "No Auth" packet from the remote peer, it confirms that the Local unit has authentication enabled (expecting Type 1 or 2).
Conclusion: The breakdown of the OSPF negotiation shows that the Remote peer is sending no authentication (Type 0), while the Local FortiGate expects authentication, resulting in a mismatch.
Reference:
FortiGate Security 7.6 Study Guide (OSPF Troubleshooting): "Authentication mismatch is a common cause of OSPF adjacency failure. Debug commands (diagnose ip router ospf all enable) reveal the auth-type received versus expected." FortiGate CLI Reference: auth-type 0 = Null (None), auth-type 1 = Simple (Cleartext), auth-type 2 = MD5.
質問 # 72
What are two reasons you might see iprope_in_check() check failed, drop when using the debug flow? (Choose two.)
正解：B、D
解説：
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"
質問 # 73
Refer to the exhibit.
Assuming a default configuration, which three statements are true? (Choose three.)
正解：A、B、C
解説：
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
質問 # 74
Refer to the exhibit.
The output of the command diagnose vpn tunnel list is shown.
Reviewing the debug command, what is the current status of the traffic flowing through the tunnel?
正解：D
解説：
The correct answer is D. The inbound IPsec SA was copied to the NPU.
The exhibit shows:
* npu_flag=02
* dec_npuid=1
* enc_npuid=0
The study guide gives the exact meaning of the npu_flag field:
* npu_flag=00 = Both IPsec SAs loaded to the kernel
* npu_flag=01 = Outbound IPsec SA copied to NPU
* npu_flag=02 = Inbound IPsec SA copied to NPU
* npu_flag=03 = Both outbound and inbound IPsec SAs copied to NPU
It also explains: "If the first IPsec packet is inbound and can be offloaded, the inbound SA is copied to the NPU and the npu_flag changes to 02. After both SAs are copied to the NPU, the npu_flag changes to
03."
So with npu_flag=02, only the inbound SA has been copied to the NPU. That makes D correct.
Why the other options are wrong:
* A is wrong because outbound-only offload would be npu_flag=01, not 02
* C is wrong because both directions offloaded would be npu_flag=03, not 02
* B is wrong because dec_npuid=1 identifies the NPU ID used for decryption, but it does not state that the processor is specifically NP6 . The study guide only maps the offload state through the npu_flag values in this context, not the NPU model from this field alone So the verified answer is: D .
質問 # 75
Refer to the exhibit, which shows the omitted output of a session table entry.
Which two statements are true? (Choose two.)
正解：C、D
解説：
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
質問 # 76
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P.S.Tech4ExamがGoogle Driveで共有している無料の2026 Fortinet FCSS_NST_SE-7.6ダンプ：https://drive.google.com/open?id=1jx7aQS7W2ImRwEe8TPOhohoLDX9Cu20O