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| Section | Objectives |
|---|---|
| Asset management | - Explain OT standard and Fortinet compliance - Fortinet Security Fabric for an OT network - Implement device detection on FortiGate and FortiNAC |
| Network access control | - Explain OT Ethernet concepts - Configure network segmentation schemas - Configure network access authentication |
| Monitoring and risk assessment | - Analyze security reports from FortiAnalyzer - Perform risk assessment and management - Create FortiAnalyzer event handlers |
| Network security | - Configure virtual patching - Configure security inspections for industrial protocols - Configure automation |
>> NSEI_OTS_AR-7.6 Zertifizierung <<
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40. Frage
Refer to the exhibit.
Which statement about this partial Asset Identity List page is correct? (Choose one answer)
Antwort: D
Begründung:
The correct answer is B. A firewall policy has a Virtual Patching security profile applied to it .
The decisive clue in the exhibit is the Vulnerabilities column showing KEVs and device-specific vulnerability counts. The study guide explains the virtual patching workflow in this exact way: "FortiGate performs a lookup for device-specific vulnerabilities and mitigation rules in FortiGuard," then
"FortiGuard returns specific OT virtual patching signatures," and "FortiGate caches the signatures and mitigation rules that apply to each device." That is the same behavior reflected by the Asset Identity List showing vulnerability information per detected device.
The guide then states that "When traffic related to the vulnerable device reaches FortiGate, the firewall policy with the virtual patching profile applies." It also says "A virtual patching profile can be applied to firewall policies in any direction, protecting traffic from or to the vulnerable OT device." This directly links the per-device vulnerability visibility to a Virtual Patching profile enforced through firewall policy.
The other options do not match the exhibit. Antivirus is not described in the study guide as building a device- by-device vulnerability list, Application Control is used for OT protocol and message visibility, and IPS focuses on exploit detection and prevention. The Vulnerabilities/KEVs display is the indicator that FortiGate is using Virtual Patching logic for those OT devices.
41. Frage
Refer to the exhibit.
The configuration of firewall policies is shown.
To improve the security of your OT network, you have configured authentication in the firewall policies as shown in the exhibit, with CLI parameters set to their default settings. However, when you test HTTPS access from the LAN subnet to PLC-1, it is successful without any authentication prompt.
What is the reason?
Antwort: B
Begründung:
The correct answer is A . Policy ID 8 contains the Supervisors user group, so authentication is required for traffic matching that policy. However, policy ID 9 permits traffic to PLC-1 without a user or user-group authentication requirement. Fortinet explains that when an authentication policy is followed by a fall-through policy that does not require authentication , traffic can match the fall-through policy and proceed without generating a login prompt. This is particularly relevant because the default CLI setting is auth-on-demand implicitly. Under the default implicitly behavior, FortiGate does not trigger active authentication when a matching unauthenticated fall-through policy exists. Setting auth-on-demand always, or requiring authentication on all potentially matching policies, changes that behavior. Therefore, HTTPS succeeds without prompting because authentication was not configured on firewall policy ID 9 .
42. Frage
You want to protect OT devices that are not updated against known vulnerabilities so you apply virtual patching to the firewall policies. What must you check to confirm that the OT devices are virtually patched?
(Choose one answer)
Antwort: D
Begründung:
The correct answer is C. The output of the CLI command get rule otvp status . In the Virtual Patching section, the study guide shows the workflow where FortiGate queries FortiGuard for device-specific vulnerabilities, receives OT virtual patching signatures, maps them to the device MAC address, and then explicitly displays the CLI verification command get rule otvp status together with fields such as Rule-name
, Vuln_type , and Cve . This is the direct confirmation mechanism shown in the guide for checking whether OT devices have virtual patching rules associated with them.
The other options are less accurate for confirmation. The OT View page is for Purdue-level visualization, and the Asset Identity List page shows device and asset information, but neither is presented in the guide as the command or control used to verify virtual patching status. The study guide specifically uses get rule otvp status as the status check tied to virtual patching behavior.
43. Frage
For the installation of your first FortiGate device, you want to minimize the impact in your OT network.
Therefore, you deploy it initially as an offline IDS. Which two statements about this deployment are correct?
(Choose two answers)
Antwort: A,C
Begründung:
Deploying a FortiGate in offline IDS (also known as one-arm sniffer mode) is a common strategy in OT environments for several reasons found in the study guide:
* Priority of Availability : In OT, availability and safety are critically important and prioritized higher than in IT. An offline IDS minimizes impact because it does not sit in the direct path of production traffic.
* Network Sensor Role : In this mode, the FortiGate is connected to a mirror/SPAN port on a switch. It acts as a network sensor , receiving a copy of the traffic rather than having the traffic flow through it.
This confirms Statement A is correct and Statement D is incorrect.
* Passive vs. Active : The guide explicitly states that in OT environments, passive methods are preferred over active methods to avoid negatively impacting performance or causing process interruptions.
* Depth of Visibility : Even though the device is offline, you apply security profiles (such as IPS, Application Control, and Antivirus) to the sniffer interface. This allows the FortiGate to analyze the copied traffic and provide deep visibility into the OT assets and their behaviors. This confirms Statement B is correct.
* Detection vs. Prevention : An IDS (Intrusion Detection System) is passive ; it can detect threats but cannot reset connections or drop packets to block attacks. Therefore, it cannot block zero-day attacks, making Statement C incorrect.
44. Frage
According to the IEC 62443 standard, your security level is 4 . What is your OT environment defending against? (Choose one answer)
Antwort: D
Begründung:
According to the OT Security 7.6 Architect study guide regarding IEC 62443 Security Levels :
* Security Level 4 (SL 4) Definition : This level provides " Protection against intentional violation using sophisticated means with extended resources, specific skills, and high motivation " .
* Real-World Application : The study guide specifically notes: " If you are facing a syndicate of cyber extortionists with extensive resources and capabilities, then you should strive for security level 4 " .
* Comparison to other levels :
* SL 1 : Protection against " casual or unintentional system violation " .
* SL 2 : Protection against " intentional violation using simple means with low resources " .
* SL 3 : Protection against " intentional violation using sophisticated means with moderate resources " .
45. Frage
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