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| Section | Objectives |
|---|---|
| Enterprise Firewall | - Routing and advanced networking - Authentication and identity - High availability - Centralized management and analytics - Security Fabric integration - Advanced firewall deployment - VPN technologies - Troubleshooting |
| SD-WAN | - Overlay VPN - SD-WAN routing - SD-WAN architecture - Deployment and troubleshooting - Application steering - Performance SLA |
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問題 #53
Refer to the exhibit.
The sniffer log on two FortiGate devices are shown. Based on the information in the log, which two factors explain the output on FortiGate FGT-02? (Choose two answers)
答案：A,B
解題說明：
The output on FGT-01 confirms that the device is actively encapsulating traffic and sending it as ESP packets (Protocol 50) out of port1 towards the IP address 97.86.16.52. The logs show outgoing packets, which confirms FGT-01 is attempting to initiate or maintain the tunnel and that NAT-Traversal is not being used (as it uses raw ESP).
The output on FGT-02, however, displays (no packets captured). This is significant because the sniffer command diagnose sniffer packet any ' esp ' captures traffic at the network interface level (ingress), regardless of whether a matching VPN configuration exists on the receiving unit. The absence of packets proves that the ESP traffic generated by FGT-01 is physically not arriving at FGT-02 ' s interface.
This behavior is explained by two primary factors:
Option A (Blocking): An intermediate device, such as an ISP router or firewall, is dropping Protocol 50 traffic. Unlike UDP 500/4500, raw ESP is often blocked by default on many networks or legacy devices.
Option C (Routing/Misconfiguration): If the administrator configured the wrong remote peer IP on FGT-01, the packets are being routed to a different destination entirely. Consequently, they never arrive at FGT-02 to be captured.
Option B is incorrect because even without a configured VPN tunnel, the sniffer would still display the incoming ESP packets if they were reaching the interface. Option D is incorrect because FGT-01 is sending ESP, making ' esp ' the correct filter.
問題 #54
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.)
答案：A,C
解題說明：
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
問題 #55
Refer to the exhibit.
The packet capture output of a ClientHello message is shown.
You are updating a firewall policy that includes SSL certificate inspection. You are capturing packets from traffic passing through this firewall policy.
Which two statements about the packet capture are correct? (Choose two.)
答案：A,C
解題說明：
The FortiOS 7.6 Administrator Study Guide states: "The only security features you can apply using SSL certificate inspection mode are web filtering and application control." Certificate inspection does not decrypt the encrypted payload. However, it can extract the destination hostname from the ClientHello's server name indication (SNI). The exhibit exposes www.sharepoint.com in the server_name extension, enabling FortiGate to identify, categorize, and enforce web-filtering rules for the requested website. Therefore, option B is correct.
Antivirus inspection requires FortiGate to examine files or other application-layer content inside the encrypted payload. Because certificate inspection does not decrypt that content, an antivirus profile cannot be applied effectively; full SSL inspection is required. This eliminates option A.
The SAN field is not mandatory. FortiGate first attempts to obtain the hostname from SNI and can validate it against either the common name (CN) or SAN in the server certificate. Accordingly, option C is incorrect.
The supported_versions extension explicitly lists TLS 1.3 and TLS 1.2 and no other versions. Although the ClientHello's legacy Version field displays TLS 1.2 (0x0303), TLS 1.3 clients retain this legacy value for compatibility. The extension identifies the versions the client actually supports, making option D correct.
問題 #56
Refer to the exhibit.
The VDOM configuration on a FortiGate device is shown. You discover that web filtering stopped working in Core1 and Core2 after a maintenance window.
What are two reasons why web filtering stopped working? (Choose two answers.)
答案：C,D
解題說明：
The exhibit identifies the root VDOM as the management VDOM, indicated by the green check mark. The Enterprise Firewall 7.6 Administrator Study Guide explains that the management VDOM handles FortiGuard database downloads, license validation, and FortiGuard rating connectivity on behalf of the entire FortiGate system. It states that FortiGuard updates obtained through the management VDOM "will affect all VDOMs." Consequently, the root VDOM must reach either a public Fortinet Distribution Network server or a FortiManager configured as a FortiGuard Distribution Server in an isolated environment. The guide specifically identifies connectivity to "a FortiManager serving as a FortiGuard Distribution Server (FDS) in a closed network" as the alternative to public FortiGuard access. Loss of both paths prevents Core1 and Core2 from using current FortiGuard web-filtering information. Therefore, options A and B are correct.
Core1 and Core2 do not need to become management VDOMs; FortiGate uses one designated management VDOM for these system-level services. A VDOM link is used to route user traffic between VDOMs and is not required for distributing FortiGuard services, eliminating option D.
問題 #57
Which two statements about application-layer test commands are true? (Choose two answers)
答案：C,D
解題說明：
The correct answers are A and D .
The study guide states:
"Application layer test commands do not display information in real time. They display statistics and configuration information about a feature or process. You can also use some of these commands to restart a process or execute a change in its operation." This directly proves:
* A is correct because they can display statistics and configuration information
* D is correct because some of them can restart a process/application
Why the other options are wrong:
* B is wrong because the study guide explicitly says application-layer test commands do not display information in real time . Real-time output is done with diagnose debug application ... commands instead.
* C is wrong because diagnose debug console enable is related to debug output behavior, not a requirement for application-layer test commands to display output. The study guide does not describe test commands that way.
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問題 #58
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