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質問 # 141
Refer to the exhibit.
Which statement about this partial Asset Identity List page is correct? (Choose one answer)
正解：B
解説：
Based on the OT Security 7.6 Architect study guide regarding the Asset Identity Center and Asset Management :
* Vulnerability Visibility : The Asset Identity List tab displays key metadata for IT and OT devices, including detected addresses, users, and a specific column for Vulnerabilities .
* Virtual Patching Feature : In the OT Security 7.6 architecture, the " Vulnerabilities " column is populated through the OT Security Service license, which includes " OT vulnerability correlation definitions & virtual patching signatures " .
* Correlation Mechanism : FortiGate extracts metadata from OT traffic and uses these signatures to identify known vulnerabilities on the assets. For these vulnerabilities to be identified and correlated in the Asset Identity Center as shown in the exhibit (displaying a count of 8 vulnerabilities), the Virtual Patching feature must be active.
* Architectural Implementation : Virtual patching is a critical component of the " Protection " layer in OT networks, allowing administrators to secure legacy or unpatchable PLCs and RTUs by blocking exploit attempts at the network level using IPS-based virtual patching signatures.
* Exhibit Analysis : The presence of identified vulnerabilities (the number " 8 " in the red shield) in the Asset Identity List confirms that the FortiGate is actively performing vulnerability correlation, which is the operational result of having a Virtual Patching security profile applied to the relevant firewall policy.
質問 # 142
Refer to the exhibit, which shows a nonprotected OT environment. An administrator needs to implement appropriate protection on the OT network.
Which three steps should an administrator take to protect the OT network? (Choose three.)
正解：A、B、E
解説：
Use segmentation: Network segmentation is critical in an OT environment to isolate different ICS (Industrial Control System) networks and protect sensitive systems. This limits the spread of threats and provides controlled access between segments.
Deploy a FortiGate device within each ICS network: Deploying FortiGate devices in each ICS network ensures that localized security measures are in place to detect and prevent unauthorized access or threats.
Configure firewall policies with industrial protocol sensors: Configuring policies with industrial protocol sensors helps monitor and protect OT-specific traffic (e.g., Modbus, DNP3).
This enables the FortiGate to detect and respond to malicious activities targeting OT protocols.
質問 # 143
Refer to the exhibit.
A simplified OT network is shown. You want to optimize the protection of this OT network. Which two controls must you implement? (Choose two answers)
正解：B、D
解説：
The correct answers are B. IPS on FortiGate_Level5 and C. Virtual patching on FortiGate_Level2 .
The study guide explains that "the first line of defense is securing the IT side of your network" and that FortiGate should be placed to protect ICS environments and stop threats from propagating from IT into OT. It also states that IPS improves OT security because "today's threat landscape requires IPS to block a wider range of threats and improve OT security" and that in IPS mode, vulnerable devices are protected . This makes FortiGate_Level5 , at the upper boundary near the DMZ and external connectivity, the correct place to implement IPS as a primary protection control.
The study guide also states in the Purdue model section that "Level 2 consists of the processes and programs that control the PLCs, RTUs, and IEDs found at Level 1" and that "it is necessary to segment, or even microsegment, these servers with firewall segmentation, along with policies that include application control and virtual patching." In addition, the virtual patching section says "Virtual patching protects OT devices that have not yet been updated against vulnerability exploits" and applies when traffic related to the vulnerable device reaches the firewall policy. Since FortiGate_Level2 sits between the process network and the control network, it is the right enforcement point for virtual patching to protect the PLC-side assets.
Option A is not one of the best answers because offline IDS only detects and logs attacks; the guide says "no traffic flows through FortiGate" in offline IDS mode, whereas IPS can actually block threats. Option D is also not the best answer because OT signatures are enabled within the IPS framework, but the stronger control explicitly described for this design is to deploy IPS at the upper boundary and virtual patching closer to vulnerable OT devices .
質問 # 144
Refer to the exhibit.
You have configured event handlers on FortiAnalyzer to monitor your OT network.
Based on the partial Event Monitor page shown in the exhibit, which statement is correct?
正解：D
解説：
The IPS event status is shown as Mitigated, which indicates the threat was successfully stopped by the security control. For IPS logs, this corresponds to traffic being blocked or dropped rather than merely detected.
質問 # 145
As an OT network administrator, you are managing three FortiGate devices that each protect different levels on the Purdue model. To increase traffic visibility, you are required to implement additional security measures to detect protocols from PLCs.
Which security sensor must you implement to detect protocols on the OT network?
正解：D
解説：
The FortiGuard Operational Technology (OT) Security Service for FortiGate combines IPS and application control signatures tailored to OT environments, enabling detection and protection of OT-specific protocols and threats.
IPS is essential for detecting network-level threats and protocols associated with OT devices including PLCs.
Deep packet inspection (DPI) is part of the traffic analysis process but the primary sensor for detecting specific OT protocols is IPS.
Antivirus and application control are generally less focused on protocol detection for OT networks compared to IPS.
質問 # 146
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