[2026年05月27日] 信頼され続けるFCSS_NST_SE-7.4試験のコツがあるPDF試験材料
2026年最新のFCSS_NST_SE-7.4テスト解説（更新されたのは104問があります)
Fortinet FCSS_NST_SE-7.4 認定試験の出題範囲：
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質問 # 22
Which statement about IKEv2 is true?
- A. IKEv1and IKEv2 share the concept of phase1and phase2.
- B. IKEv1and IKEv2 use same TCP port but run on different UDP ports.
- C. Both IKEv1and IKEv2 share the feature of asymmetric authentication.
- D. IKEv1and IKEv2 have enough of the header format in common that both versions can run over the same UDP port.
正解：D
質問 # 23
Exhibit.
Refer to the exhibit, which shows the output of diagnose automation test.
What can you observe from the output? (Choose two.)
- A. The automation stitch test failed but the HA failover was successful.
- B. The automation stitch test is not being logged.
- C. An HA failover occurred.
- D. The test was unsuccessful.
正解：B、D
質問 # 24
Refer to the exhibit, which shows a FortiGate configuration. An administrator is troubleshooting a web filter issue on FortiGate.
The administrator has configured a web filter profile and applied it to a policy; however, the web filter is not inspecting any traffic that is passing through the policy.
What must the administrator do to fix the issue?
- A. Disable webfilter-force-off.
- B. Change protocolto TCP and port to 53.
- C. Disable webfilter-force-offat the VDOM level.
- D. Set sdns-server-ipto service.fortiguard.net.
正解：A
解説：
The global "kill switch" for web filtering is turned on (set webfilter-force-off enable), which bypasses all web filters. You need to turn it off (for example with config system fortiguard set webfilter-force-off disable) so that your web filter profile will actually inspect traffic.
質問 # 25
Refer to the exhibit, which shows one way communication of the downstream FortiGate with the upstream FortiGate within a Security Fabric.
What three actions must you take to ensure successful communication? (Choose three.)
- A. FortiGate must not be in NAT mode.
- B. Ensure the port for Neighbor Discovery has been changed.
- C. You must enable Security Fabric/Fortitelemetry on the receiving interface of the upstream FortiGate.
- D. You must authorize the downstream FortiGate on the root FortiGate.
- E. Ensure TCP port 8013 is not blocked along the way.
正解：C、D、E
解説：
Authorize the downstream FortiGate on the root FortiGate.
Only registered/authorized devices can join the Security Fabric.
Ensure TCP port 8013 is not blocked along the path.
Port 8013 carries the Fabric control/telemetry session, so it must be open end to end.
Enable Security Fabric/FortiTelemetry on the upstream FortiGate's receiving interface.
Telemetry must be activated on the interface that accepts the downstream FortiGate's connection.
質問 # 26
What are two functions of automation stitches? (Choose two.)
- A. You can create automation stitches to run diagnostic commands and attach the results to an email message when CPU or memory usage exceeds specified thresholds.
- B. You can configure automation stitches on any FortiGate device in a Security Fabric environment.
- C. You can configure automation stitches to execute actions sequentially by taking parameters from previous actions as input for the current action.
- D. You can set an automation stitch configured to execute actions in parallel to insert a specific delay between actions.
正解：A、C
解説：
Automation stitches can run actions in sequence, passing output from one action as input to the next.
They can be set to run diagnostics (e.g., CPU/memory checks) and email the results when thresholds are exceeded.
質問 # 27
Which command do you use to enable a timestamp in a real-time debug?
- A. diagnose application timestamp enable
- B. diagnose debug console timestamp enable
- C. diagnose debug application timestamp enable
- D. diagnose timestamp enable
正解：B
質問 # 28
Refer to the exhibit, which shows the output of a policy route table entry.
Which type of policy route does the output show?
- A. A regular policy route, which is associated with an active static route in the FIB
- B. An ISDB route
- C. AnSD-WAN rule
- D. A regular policy route
正解：B
質問 # 29
Refer to the exhibit, which contains the output of a debug command.
If the default settings are in place, what can you conclude about the conserve mode shown in the exhibit?
- A. FortiGate is currently allowing new sessions that require flow-based content inspection and blocking sessions that require proxy-based content inspection.
- B. FortiGate is currently allowing new sessions that require flow-based or proxy-based content inspection but is not performing inspection on those sessions.
- C. FortiGate is currently allowing new sessions that require flow-based or proxy-based content inspection and is performing inspection on those sessions.
- D. FortiGate is currently blocking all new sessions regardless of the content inspection requirements or configuration settings because of high memory use.
正解：A
解説：
When memory usage exceeds the red threshold but is still below the extreme threshold, FortiGate's conserve mode will admit new sessions that use flow based inspection but will reject any that require proxy based inspection.
質問 # 30
Exhibit.
Refer to the exhibit, which shows the output of get system ha status.
NGFW-1 and NGFW-2 have been up for a week.
Which two statements about the output are true? (Choose two.)
- A. If FGVM...649 is rebooted. FGVM...650 will become the primary and retain that role, even after FGVM...649 rejoins the cluster.
- B. If port 7 becomes disconnected on the secondary, both FortiGate devices will elect itself as primary.
- C. If a configuration change is made to the primary FortiGate at this time, the secondary will initiate a synchronization reset.
- D. If no action is taken, the primary FortiGate will leave the cluster because of the current sync status.
正解：A、B
質問 # 31
Refer to the exhibit. Which three pieces of information does the diagnose sys top command provide? (Choose three.)
- A. The miglogd daemon is running on CPU core ID 0.
- B. If the neweli daemon continues to be in the R state, it will need to be manually restarted.
- C. The cmdbsvr process is occupying 2.4% of the total user memory space.
- D. The miglogd daemon would be on top of the list, if the administrator pressed m on the keyboard.
- E. The diagnose sys top command has been running for 18 minutes.
正解：A、C、E
解説：
The last column shows the CPU core ID, so you can see miglogd is running on core 0.
The "Run Time" line tells you how long the system (and thus the top command) has been up -
18 minutes in this case.
The MEM% column shows cmdbsvr is using 2.4 % of memory.
質問 # 32
What are two reasons that an OSPF router does not have any type 5 link-state advertisements (LSAs) in its link-state database (LSDB)? (Choose two.)
- A. The peer of the local router is using a prefix-list-outconfiguration to prevent all type 5 LSAs to be advertised.
- B. IP protocol 89 is blocked between the local router and its peer.
- C. There is no autonomous system border router (ASBR) in the network.
- D. The local router is located in a stub area.
正解：C、D
解説：
The local router is located in a stub area.
Stub areas suppress Type 5 LSAs, so none appear in the LSDB.
There is no autonomous system border router (ASBR) in the network.
Without an ASBR there are no external routes to advertise, so no Type 5 LSAs are ever generated.
質問 # 33
Refer to the exhibit, which shows the output of a BGP debug command.
Whatcan you conclude about the router in this scenario?
- A. All of the neighbors displayed are part of a single BGP configuration on the local router with the neighbor-range set to a value of 4.
- B. An inbound route-map on local router is blocking the prefixes from neighbor 100.64.3.1.
- C. The router 100.64.3.1 needs to update the local AS number in its BGP configuration in order to bring up the 8GP session with the local router.
- D. The BGP session with peer 10.127.0.75 is up.
正解：D
質問 # 34
Which two configuration changes can you apply to optimize memory use on FortiGate? (Choose two.)
- A. Decrease the session TTL.
- B. Increase the maximum file size for AV inspection.
- C. Reduce the FortiGuard cache TTL.
- D. Use flow-based inspection.
- E. Increase TCP session timers.
正解：A、C
質問 # 35
When investigating FortiGuard connectivity issues, which action is a valid troubleshooting step?
- A. Use the FortiGuard real-time debug command to verify rating requests.
- B. Verify management VDOM internet access.
- C. Verify that DNS requests are being proxied if auto-update tunneling is enabled.
- D. Configure a virtual IP to forward port 443 to the FortiGate external IP.
正解：B
質問 # 36
Refer to the exhibit. Assuming a default configuration, which three statements are true? (Choose three.)
- A. User C: Fail. There is no route to 10.0.4.63 using port1 in the touting table.
- B. User A: Pass. The default static route through wan1 passes the RPF check regardless of the source IP address.
- C. User B: Pass. FortiGate will use asymmetric routing using wan1 to reply to traffic for
95.56.234.24. - D. User B: Fail. There is no route to 95.56.234.24 using wan2 in the routing table.
- E. Strict RPF is enabled by default.
正解：A、B、D
解説：
User B: Fail. There is no route to 95.56.234.24 using wan2 in the routing table.
Since 95.56.234.24 doesn't match 10.0.2.0/24, traffic arriving on wan2 would have to be routed out via the default gateway on wan1-and strict reverse path checks will drop it.
User C: Fail. There is no route to 10.0.4.63 using port1 in the routing table.
Port1 only knows about 10.0.3.0/24-without a static route or proxy ARP for 10.0.4.0/24, the FortiGate won't accept or route that traffic.
User A: Pass. The default static route through wan1 passes the RPF check regardless of the source IP address.
Traffic from 71.234.149.16 hits wan1, and the return path is also via wan1 (the default route), so it succeeds.
質問 # 37
Refer to the exhibit, which shows the partial output of a real-time OSPF debug.
Why are the two FortiGate devices unable to form an adjacency?
- A. One FortiGate device is configured to require authentication, while the other is not.
- B. The passwords on the FortiGate devices do not match.
- C. The two FortiGate devices attempting adjacency are in area 0.0.0.0.
- D. The Hello packet is being sent from an OSPF router with ID 0.0.0.112.
正解：A
質問 # 38
In which two slates is a given session categorized as ephemeral? (Choose two.)
- A. A TCP session waiting for FIN ACK
- B. A TCP session waiting for the SYN ACK
- C. A UOP session with packets sent and received
- D. A UDP session with only one packet received
正解：B、D
質問 # 39
Refer to the exhibit, which shows the output of the command get router info ospf neighbor.
To what extent does FortiGate operate when looking at its OSPF neighbors? (Choose two.)
- A. The local FortiGate is the DR.
- B. Neighbor 0.0.0.18 is the designated router (DR).
- C. The local FortiGate has at least one interface that participates in a broadcast network.
- D. The local FortiGate has at least one interface that participates in a point-to-point network.
正解：C、D
解説：
The command on this slide shows a summary of the statuses of all the OSPF neighbors. For each neighbor, it displays the adjacency state and if it is a DR, a BDR, or neither (DROther) Pagina 362 Enterprise_Firewall_7.2_Study. - Point-to-point networks contain only two peers, one at each end of a point-to-point link - Broadcast networks (multi-access) support more than two attached routers. They also support sending messages to multiple recipients (broadcasting). Pagina 365 Enterprise_Firewall_7.2_Study. In any multi-access network there is one DR and one BDR. Pagina 439 Network_Security_Support_Engineer_7.4_Study FULL/- This represents a point-to-point network
質問 # 40
Refer to the exhibit, which shows the port1 interface configuration on FortiGate and partial session information for ICMP traffic.
What happens to the session information if a routing change occurs that affects this session?
- A. Only the interface and gateway information for dev=7 will be removed.
- B. The session will be flagged as dirty but no route lookups will be performed.
- C. The session information will not change unless the current route has been removed from the routing table.
- D. Sessions involving port7 or port19 will not have their routing information flushed.
正解：C
質問 # 41
Which two statements about Security Fabric communications are true? (Choose two.)
- A. By default, the downstream FortiGate establishes a connection with the upstream FortiGate using TCP port 8013.
- B. The default port for Neighbor Discovery can be modified.
- C. FortiTelemetry and Neighbor Discovery both operate using TCP.
- D. FortiTelemetry must be manually enabled on the FortiGate interface.
正解：A、D
質問 # 42
During which phase of IKEv2 does the Diffie-Helman key exchange take place?
- A. IKE_SA_INIT
- B. Create_CHILD_SA
- C. IKE_Auth
- D. IKE_Req_INIT
正解：A
質問 # 43
Exhibit.
Refer to the exhibit, which shows the output of a session. Which two statements are true? (Choose Iwo.)
- A. The session was initiated from an authenticated user.
- B. The session is being offloaded.
- C. The session is being inspected using flow inspection.
- D. The TCP session has been successfully established.
正解：A、D
質問 # 44
Refer to the exhibit, which shows a partial output of a real-time LDAP debug.
What two conclusions can you draw from the output? (Choose two.)
- A. FortiOS collects the user group information.
- B. The user was found in the LDAP tree, whose root is TAC.ottawa.fortinet.com.
- C. FortiOS is performing the second step (Search Request) in the LDAP authentication process.
- D. FortiOS performs a bind to the LDAP server using the user's credentials.
正解：B、C
解説：
The log's search base is DC=TAC,DC=ottawa,DC=fortinet,DC=comand the message get_all_dn Found DN 1:CN=John Smith,CN=Users,...confirms the user was located under that LDAP tree (TAC.ottawa.fortinet.com).
Seeing start_search_dn base...filter:sAMAccountName=jsmithand Going to
SEARCH stateshows FortiOS is executing the LDAP "Search Request" step of the bind and search authentication flow.
質問 # 45
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