View Full Fortinet NSE6_OTS_AR-7.6 Exam Dumps and Practice Test Dumps.

 

Question 281

What is the primary purpose of monitoring communication between OT security zones?

1. To increase the number of open network paths
2. To eliminate the need for access control
3. To allow unrestricted communication
4. To identify and control traffic crossing security boundaries

Correct Answer: 4

Explanation

Monitoring communication between OT security zones provides visibility into traffic crossing important security boundaries. Security teams can identify expected communication patterns and detect unexpected connections between systems that should have limited interaction. This visibility supports firewall policy validation, incident investigation, and anomaly detection. For example, communication from an enterprise workstation toward a sensitive control zone may require investigation if it is not part of an approved process. Monitoring should be combined with restrictive access policies rather than used as a replacement for them. Proper visibility also helps organizations identify configuration changes or new communication paths that could increase the attack surface.

Question 282

Which security measure can reduce the impact of compromised user credentials in an OT environment?

1. Applying least privilege and strong authentication
2. Sharing administrator passwords
3. Allowing permanent unrestricted access
4. Disabling account monitoring

Correct Answer: 1

Explanation

Least privilege limits what a compromised account can access, while strong authentication makes unauthorized use of stolen credentials more difficult. Together, these controls can reduce the potential impact of credential compromise. In an OT environment, users should receive access based on their operational responsibilities, and privileged functions should be limited to authorized personnel. Authentication activity should also be monitored where appropriate so suspicious access can be investigated. Shared credentials and unrestricted accounts increase exposure because they provide broader access and reduce accountability. Regular access reviews can identify unnecessary permissions and inactive accounts, helping organizations maintain appropriate access throughout the lifecycle of OT systems.

Question 283

Which technology can help enforce communication policies between OT network segments?

1. Backup software
2. Industrial firewall
3. Office printer
4. Email client

Correct Answer: 2

Explanation

An industrial firewall can enforce communication policies between different OT network segments. Administrators can define rules based on source and destination addresses, protocols, ports, and communication direction. This allows organizations to restrict traffic to the flows required for legitimate industrial operations. Firewalls can also provide logging that helps security teams investigate unexpected or blocked communication. In OT environments, firewall policies must be designed carefully because blocking legitimate traffic can affect production processes. Policies should therefore be based on documented communication requirements and validated before deployment. Firewalls are most effective when combined with segmentation, monitoring, access control, and other layered security measures.

Question 284

Why should OT security teams maintain information about device firmware versions?

1. To increase network bandwidth
2. To disable asset monitoring
3. To support vulnerability assessment and lifecycle management
4. To allow unrestricted remote access

Correct Answer: 3

Explanation

Firmware information helps security teams understand the security and lifecycle status of OT devices. Knowing firmware versions can support vulnerability assessment, vendor advisory review, upgrade planning, and identification of unsupported systems. This information is particularly important for industrial devices that may have long operational lifecycles and cannot always be upgraded immediately. Security teams can use firmware data together with asset criticality and network exposure to prioritize risk reduction activities. Firmware updates should be carefully planned and validated because changes to industrial devices can affect operational behavior. Accurate asset records therefore support both cybersecurity planning and controlled maintenance activities.

Question 285

Which action can help reduce unnecessary exposure of an OT management interface?

1. Restrict access to authorized management systems and administrators
2. Publish the interface directly to the Internet
3. Allow anonymous access
4. Share the management password publicly

Correct Answer: 1

Explanation

Management interfaces can provide powerful capabilities for configuring OT devices and security infrastructure, so they should be accessible only to authorized users and systems. Network restrictions can limit management connections to approved administrative workstations or controlled gateways. Strong authentication and appropriate privilege levels provide additional protection. Logging management activity can also support accountability and investigation. Directly exposing management interfaces to untrusted networks increases the attack surface and can create opportunities for unauthorized access. Organizations should also review management access periodically to ensure that old accounts, unnecessary network paths, and excessive permissions are removed according to established security and operational procedures.

Question 286

What is a major benefit of using a jump server for OT administration?

1. It allows every user direct access to controllers
2. It provides a controlled and monitored access point for administrative connections
3. It removes the need for authentication
4. It exposes OT systems to the Internet

Correct Answer: 4

Explanation

A jump server can provide a controlled access point for administrators who need to reach systems inside an OT environment. Instead of allowing direct connections from broad networks, administrators can authenticate through the jump server and then access approved systems. This architecture can simplify access control and improve visibility into administrative sessions. Depending on the implementation, sessions and activities can also be monitored or recorded. The jump server itself should be securely configured and protected because it becomes an important security component. Access should remain limited according to operational requirements, and administrative privileges should follow the principle of least privilege.

Question 287

Which activity can help establish a normal OT network behavior baseline?

1. Disabling network monitoring
2. Allowing unrestricted communication
3. Observing legitimate communication patterns over time
4. Removing asset records

Correct Answer: 3

Explanation

A network baseline is developed by observing legitimate communication and identifying recurring patterns. Security teams can examine which devices communicate, which protocols are used, how frequently connections occur, and which destinations are expected. OT environments often have relatively predictable communication, making this approach useful for anomaly detection. Baselines should account for legitimate maintenance and operational changes so that normal activities do not constantly generate alerts. Asset inventories and network documentation can improve the quality of the baseline. Once established, the baseline should be reviewed periodically because industrial environments evolve through equipment replacements, software changes, production modifications, and network redesigns.

Question 288

What should be done when a firewall rule is found to permit unnecessary OT traffic?

1. Ignore the rule permanently
2. Review and modify the rule through controlled change management
3. Disable all firewall protection
4. Allow additional unrestricted traffic

Correct Answer:2

Explanation

Unnecessary firewall access can increase the attack surface of an OT environment. When such a rule is identified, security teams should review its purpose and determine whether any legitimate operational dependency exists. If the access is no longer required, the rule can be modified or removed through the organization’s approved change-management process. Changes should be tested carefully because an apparently unnecessary connection may support an undocumented industrial function. Firewall logs and configuration records can help determine how the rule is being used. Regular policy reviews are valuable because old rules can remain in place after systems or operational requirements change.

Question 289

Which type of traffic may deserve investigation in a normally stable OT network?

1. A known scheduled backup
2. Expected HMI-to-PLC communication
3. Approved engineering maintenance
4. An unexpected connection from an unknown workstation to several controllers

Correct Answer: 4

Explanation

An unexpected connection from an unknown workstation to several controllers may represent a significant deviation from normal OT behavior. Security analysts should determine whether the workstation is authorized and whether the activity corresponds to a documented maintenance or engineering task. If no legitimate explanation exists, the event may indicate unauthorized access, malware activity, or a configuration issue. Analysts should review network traffic, asset information, firewall records, and relevant operational schedules before taking containment action. Because controllers can support critical industrial processes, investigations should be coordinated with appropriate operational personnel to avoid unnecessarily disrupting legitimate activity.

Question 290

What is an important consideration when deploying intrusion prevention in an OT environment?

1. It should be tested carefully to avoid disrupting legitimate industrial traffic
2. It should block every packet regardless of context
3. It should replace all segmentation
4. It should operate without any monitoring

Correct Answer:1

Explanation

Intrusion prevention controls can actively block or modify network traffic, so their deployment in OT environments requires careful planning. Industrial systems may use specialized protocols and communication patterns that conventional security controls do not always understand correctly. Incorrect blocking could interfere with legitimate control traffic or operational processes. Security teams should therefore test policies using representative traffic and coordinate with engineering and operations personnel. Monitoring and staged deployment can help identify unexpected effects before broader enforcement is enabled. Intrusion prevention should complement segmentation, firewall controls, authentication, and monitoring rather than being treated as a standalone solution for OT cybersecurity.

Question 291

Why is network segmentation useful during an OT security incident?

1. It can limit the movement of threats between network zones
2. It guarantees that no device can ever be compromised
3. It removes the need for incident response
4. It permits unrestricted communication between systems

Correct Answer:3

Explanation

Network segmentation can limit the ability of an attacker or compromised device to communicate with systems outside its assigned security zone. During an incident, this can reduce potential lateral movement and help contain the scope of the event. For example, restrictions between enterprise, DMZ, supervisory, and control networks can prevent a compromised system from directly reaching sensitive controllers. Segmentation does not guarantee complete containment because approved communication paths may still exist. Security teams should therefore combine segmentation with monitoring, access controls, incident response, and appropriate firewall policies. Regular validation is also important to ensure that segmentation remains effective as the OT environment changes.

Question 292

Which information can help determine whether an OT device is communicating as expected?

1. Office employee schedules
2. Approved communication relationships and operational context
3. Printer inventory
4. Social media activity

Correct Answer:2

Explanation

Approved communication relationships describe which systems are expected to communicate and for what operational purpose. This information can be compared with observed network traffic to determine whether a device is behaving normally. For example, a PLC may be expected to communicate with a specific HMI and engineering workstation but not with an unrelated office computer. Operational schedules can also explain temporary changes in communication during maintenance. Combining communication documentation with asset information and network monitoring improves investigation accuracy. Without this context, security teams may generate unnecessary alerts or overlook activity that represents a meaningful deviation from the expected OT architecture.

Question 293

What is the purpose of reviewing privileged account activity in an OT environment?

1. To increase administrator privileges
2. To disable security monitoring
3. To identify potentially unauthorized or unusual administrative actions
4. To remove authentication controls

Correct Answer:4

Explanation

Privileged accounts can make significant changes to OT systems, network devices, and security configurations. Reviewing their activity helps organizations identify actions that may be unauthorized, unexpected, or inconsistent with approved maintenance. Logs can provide information about authentication, configuration changes, and administrative operations. Individual administrator identities improve accountability because actions can be associated with specific users. Reviews should consider scheduled maintenance and emergency activities so legitimate actions are not incorrectly classified as suspicious. Strong authentication, least privilege, and controlled administrative access further reduce risk. Monitoring privileged activity is therefore an important part of protecting systems with significant configuration or operational authority.

Question 294

Which approach can help protect legacy OT devices that cannot receive modern security updates?

1. Connect them directly to the Internet
2. Apply compensating controls such as segmentation and restrictive access policies
3. Give them unrestricted administrative access
4. Disable all network monitoring

Correct Answer:1

Explanation

Legacy OT devices may remain in operation because replacing them can require significant cost, downtime, or engineering work. When security updates are unavailable, compensating controls can reduce exposure. These may include network segmentation, restrictive firewall policies, limited administrative access, passive monitoring, controlled remote access, and additional network protections. Such controls do not remove the underlying limitations of unsupported technology, so organizations should also maintain lifecycle plans where practical. Asset criticality and exposure should guide prioritization. Any changes affecting legacy equipment should be carefully tested because older devices may be particularly sensitive to unexpected network activity or configuration changes.

Question 295

What should security teams do when legitimate maintenance creates unusual OT traffic?

1. Ignore all future anomalies
2. Remove the monitoring system
3. Document and validate the maintenance activity and update baselines when appropriate
4. Disable firewall controls permanently

Correct Answer:2

Explanation

Legitimate maintenance can temporarily create network behavior that differs from normal OT operations. Security teams should verify the activity against approved maintenance records and coordinate with the responsible operational personnel. Once the activity is confirmed as legitimate, relevant documentation can help explain the event during future investigations. If the change becomes part of normal operations, the appropriate network or behavioral baseline can be updated through a controlled process. Security teams should not simply disable monitoring because unusual legitimate activity occurs. Maintaining visibility while incorporating verified operational changes allows anomaly detection to remain useful without generating unnecessary repeated alerts.

Question 296

Which control can help ensure that only authorized devices communicate with a sensitive OT segment?

1. Unrestricted routing
2. Network access control and restrictive firewall policies
3. Public web hosting
4. Shared administrator passwords

Correct Answer:3

Explanation

Network access controls and restrictive firewall policies can work together to limit which devices and systems are allowed to communicate with a sensitive OT segment. Access policies may consider device identity, network location, addresses, protocols, and other available characteristics. The exact implementation depends on the OT architecture and capabilities of the security technology. Controls should be carefully tested because blocking legitimate devices could affect industrial operations. Asset inventory information can help administrators identify authorized systems and investigate unknown devices. Combining access control with monitoring provides both preventive and detective capabilities, making it easier to identify unauthorized devices and communication attempts.

Question 297

Why should OT security alerts be prioritized according to asset criticality?

1. Every device has exactly the same operational importance
2. Critical assets can have greater consequences if compromised or disrupted
3. Asset criticality is unrelated to incident response
4. Prioritization eliminates the need for monitoring

Correct Answer:1

Explanation

Not all OT assets have the same operational importance or potential impact if compromised. A controller supporting a critical production process may require faster investigation than a noncritical test system. Asset criticality helps security teams prioritize alerts and allocate response resources appropriately. Determining criticality should consider operational function, safety implications, dependencies, and potential consequences of disruption. Security teams should maintain accurate asset information so monitoring platforms can use it during alert analysis. Prioritization does not mean lower-value systems can be ignored; rather, it helps organizations focus attention according to risk while maintaining broad visibility across the OT environment.

Question 298

Which practice helps maintain reliable OT security documentation?

1. Update network and asset records when approved changes occur
2. Delete old architecture information immediately
3. Avoid documenting new devices
4. Allow undocumented configuration changes

Correct Answer:4

Explanation

Accurate documentation is important for understanding OT architecture, asset relationships, communication requirements, and security controls. When approved changes occur, network diagrams, asset inventories, firewall rules, and related records should be updated accordingly. Outdated documentation can cause security teams to misunderstand dependencies or apply incorrect policies. Documentation should be maintained through controlled change-management procedures and protected from unauthorized modification. During incident response, accurate records can help analysts identify affected systems and determine safe containment options. Good documentation also supports audits, maintenance, troubleshooting, and future architecture planning. Keeping records current is therefore an important part of an effective OT cybersecurity program.

Question 299

What is a benefit of combining asset inventory with network monitoring?

1. It provides context about what devices are present and how they communicate
2. It removes the need for security policies
3. It allows unrestricted access
4. It eliminates the need for incident response

Correct Answer:2

Explanation

Combining asset inventory with network monitoring provides both identity and behavioral context. An inventory can show what a device is, where it is located, its operational role, and its importance, while network monitoring can show how it communicates with other systems. Together, these capabilities help identify unexpected devices, unusual communication, and potential changes in normal behavior. This information can support segmentation decisions, incident investigations, vulnerability prioritization, and security policy development. Maintaining accurate inventory data is essential because inaccurate asset information can reduce the quality of alerts and make it more difficult to determine whether observed activity is expected or suspicious.

Question 300

Which strategy provides layered protection for an OT environment?

1. Relying only on a perimeter firewall
2. Allowing all internal communication
3. Combining segmentation, access control, monitoring, secure remote access, and response procedures
4. Connecting industrial systems directly to the Internet

Correct Answer:3

Explanation

A layered OT security strategy combines multiple controls so that weaknesses in one protection mechanism do not expose the entire environment. Segmentation can restrict network paths, while firewalls control communication between zones. Strong authentication and least privilege protect access, and monitoring provides visibility into suspicious activity. Secure remote-access mechanisms reduce exposure from external connections, while incident response procedures prepare teams to investigate and contain incidents. Asset management and configuration controls provide additional context and resilience. Because OT environments often contain legacy systems and have strict availability requirements, layered security allows organizations to reduce risk without relying on a single technology or control.