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

 

Question 261

Which OT security control helps identify communication that does not match an established baseline?

1. Email encryption
2. File compression
3. Network anomaly detection
4. Printer management

Correct Answer: 3

Explanation

Network anomaly detection compares observed network behavior with established patterns of normal activity. In OT environments, many devices communicate with predictable systems using known industrial protocols, making deviations potentially useful indicators for investigation. Examples may include a controller communicating with an unfamiliar workstation or a device using an unexpected protocol. An anomaly does not automatically mean that malicious activity has occurred because maintenance, configuration changes, and production activities can also alter network behavior. Security teams should therefore investigate alerts using asset information, operational schedules, and other security evidence. Effective baselining helps reduce unnecessary alerts while maintaining visibility into potentially significant changes.

Question 262

What is a key purpose of separating OT network zones?

1. To allow every system unrestricted access
2. To control communication between systems with different security requirements
3. To eliminate the need for monitoring
4. To connect controllers directly to external networks

Correct Answer: 4

Explanation

Separating OT systems into security zones allows organizations to apply different security requirements to different parts of the industrial environment. For example, enterprise systems, industrial DMZ services, supervisory systems, control networks, and field devices may require different levels of access and protection. Firewalls and other controls can regulate communication between these zones. Segmentation can reduce unnecessary connectivity and make lateral movement more difficult if a system becomes compromised. It should be designed around actual industrial communication requirements and operational dependencies. Proper zoning also improves monitoring because security teams can establish clearer expectations for traffic between defined areas.

Question 263

Which practice best supports secure management of OT administrator credentials?

1. Use individual accounts with strong authentication and appropriate privileges
2. Share one administrator password among all technicians
3. Store passwords in publicly accessible documents
4. Disable authentication logging

Correct Answer: 1

Explanation

Administrative credentials provide powerful access to OT systems and should therefore be protected carefully. Individual accounts improve accountability because actions can be associated with specific administrators. Strong authentication adds protection against stolen credentials, while least-privilege permissions reduce unnecessary administrative access. Passwords and authentication information should be stored and handled through approved secure mechanisms rather than shared documents. Authentication and administrative activity should be logged where appropriate so that suspicious access can be investigated. Regular reviews can identify inactive accounts, excessive privileges, or accounts that are no longer required. These practices reduce credential-related risks without preventing authorized maintenance activities.

Question 264

What should an OT firewall policy normally permit?

1. Every available protocol from every source
2. Only communication that is documented and operationally required
3. All Internet traffic
4. Unknown traffic by default

Correct Answer: 2

Explanation

OT firewall policies should generally be based on documented communication requirements. Security administrators should identify the systems that need to communicate, the required protocols and ports, and the appropriate direction of communication. Restricting traffic to known requirements reduces unnecessary exposure and can limit potential attack paths. A broad permit policy makes it difficult to enforce meaningful security boundaries, while an overly restrictive policy can interrupt legitimate industrial processes. Rules should therefore be tested and reviewed with operational personnel. Logging can provide additional visibility into blocked and permitted traffic. As systems change, firewall policies should be updated through controlled change-management procedures.

Question 265

Why is asset inventory important when investigating an OT security alert?

1. It provides context about the affected device and its operational role
2. It automatically resolves every vulnerability
3. It removes the need for incident response
4. It prevents all unauthorized access

Correct Answer: 4

Explanation

An accurate asset inventory provides important context during security investigations. Knowing a device’s identity, type, location, firmware, operational role, and communication relationships helps analysts determine the significance of an alert. For example, unusual activity involving a critical controller may require different handling than activity involving a noncritical test system. Asset information can also help identify whether a device is authorized or previously unknown. Maintaining the inventory continuously is important because industrial environments change through equipment replacement, upgrades, and expansion. Combining asset inventory information with network monitoring and operational records provides a stronger foundation for investigating suspicious activity.

Question 266

Which approach can reduce risk when performing vulnerability assessments on sensitive OT devices?

1. Run aggressive scans continuously
2. Disable all monitoring during the assessment
3. Use carefully planned and validated assessment methods
4. Scan every device without considering operational impact

Correct Answer: 1

Explanation

OT vulnerability assessments require careful planning because some industrial devices may react unpredictably to active scanning or unusual requests. Security teams should understand the device type, operational importance, vendor recommendations, and potential impact before selecting assessment methods. Passive monitoring can provide useful information without directly probing devices, while controlled active testing may be performed where appropriate. Testing should preferably occur in suitable environments or during approved maintenance windows when operational risks can be managed. The objective is to identify vulnerabilities without creating unnecessary disruption. Coordination between cybersecurity, engineering, and operations personnel is therefore important when assessing sensitive industrial systems.

Question 267

What is the main benefit of using protocol-aware OT security inspection?

1. It eliminates the need for authentication
2. It provides additional context about industrial communications
3. It automatically replaces legacy controllers
4. It gives all users administrator access

Correct Answer: 3

Explanation

Protocol-aware security inspection can provide deeper visibility into industrial communications than basic IP and port inspection. By recognizing industrial protocols, security technologies may identify specific communication patterns, commands, or interactions between devices. This can help security teams distinguish expected activity from unusual behavior and develop more meaningful policies. Protocol-aware inspection can be especially useful when monitoring communications involving PLCs, HMIs, engineering workstations, and other industrial components. It should be deployed carefully because security inspection must not interfere with sensitive industrial traffic. Protocol awareness complements other controls such as segmentation, authentication, monitoring, and access management rather than replacing them.

Question 268

Which action is appropriate when a previously unknown OT device is discovered?

1. Immediately connect it to the Internet
2. Ignore it because unknown devices are harmless
3. Disable all network monitoring
4. Identify, document, and investigate the device and its communication

Correct Answer: 2

Explanation

An unknown device should be investigated to determine whether it is authorized, what role it performs, and why it is present on the network. Security teams can examine its network address, observed communication, device characteristics, physical location, and relationships with other systems. Operational personnel may also know whether the device was recently installed for maintenance or expansion. Once validated, the asset should be documented in the appropriate inventory and placed within the correct security architecture. If the device is unauthorized, appropriate containment procedures can be considered. Unknown assets should not simply be ignored because undocumented equipment can create security and operational risks.

Question 269

What is the purpose of monitoring changes to OT firewall configurations?

1. To identify unauthorized or unexpected policy modifications
2. To increase Internet bandwidth
3. To remove network segmentation
4. To allow anonymous administrators

Correct Answer: 1

Explanation

Firewall configuration changes can significantly affect the security boundaries of an OT environment. Monitoring changes helps organizations identify unauthorized modifications, accidental changes, or configuration drift. Security teams can compare modifications against approved change requests and determine whether the change was legitimate. Logging administrative activity also improves accountability by showing who performed a modification and when it occurred. Configuration monitoring should be combined with controlled change-management procedures and appropriate access restrictions. Regular reviews can identify overly permissive rules that have accumulated over time. Maintaining visibility into firewall configuration changes helps preserve intended segmentation and reduces the risk of unnoticed security weaknesses.

Question 270

Which factor should be considered before isolating an OT system during an incident?

1. The employee’s preferred software
2. The system’s potential effect on industrial operations and safety
3. The color of the network cable
4. The number of office applications installed

Correct Answer: 4

Explanation

Isolating a compromised system can be an effective containment technique, but OT environments require careful consideration before taking disruptive action. A device may support an active industrial process, safety function, or communication dependency. Disconnecting it without understanding its role could create operational or safety consequences. Incident responders should evaluate the device’s function, dependencies, current process state, and available containment options. Coordination with engineering, operations, and safety personnel can help determine the safest response. Evidence preservation should also be considered. OT incident response therefore requires balancing cybersecurity containment with the need to maintain safe and reliable industrial operations.

Question 271

What is a major advantage of centralized OT security logging?

1. It allows events from multiple security components to be reviewed together
2. It eliminates all network threats
3. It automatically patches controllers
4. It replaces asset inventories

Correct Answer: 2

Explanation

Centralized logging brings security events from multiple systems into a location where they can be analyzed and correlated. In an OT environment, relevant information may come from firewalls, network monitoring platforms, authentication systems, servers, and other security components. Viewing these events together can help analysts identify relationships that may not be visible when each system is reviewed independently. Centralized logging also supports incident investigation and historical analysis. Logs should be protected against unauthorized modification and retained according to organizational requirements. Accurate time synchronization is important because analysts need reliable timestamps to reconstruct the sequence of events across different systems.

Question 272

Which method can help protect an OT network from unnecessary remote connections?

1. Expose all management services publicly
2. Use unrestricted vendor accounts
3. Restrict remote access through approved gateways and policies
4. Disable authentication requirements

Correct Answer: 3

Explanation

Remote access should be controlled because external connections can provide an attack path into sensitive industrial environments. Approved remote-access gateways can provide a centralized point where authentication, authorization, session monitoring, and network restrictions can be applied. Access should be limited to required systems and should normally be available only for an approved period. Vendor access should follow the same principles rather than relying on permanent unrestricted accounts. Direct exposure of management services to the Internet should be avoided when controlled alternatives are available. Strong remote-access controls help reduce the risk associated with stolen credentials, unauthorized connections, and poorly managed third-party access.

Question 273

Why should OT security teams maintain network communication baselines?

1. To eliminate all industrial protocols
2. To provide a reference for identifying unusual communication
3. To disable security alerts
4. To permit unrestricted traffic

Correct Answer: 4

Explanation

A network communication baseline describes expected traffic patterns within an OT environment. It can include known communication partners, protocols, ports, frequency, and other characteristics of normal industrial activity. Security teams can use this reference to identify changes that may require investigation. Baselines are especially useful in OT environments because many industrial systems communicate predictably. However, legitimate changes such as maintenance, equipment replacement, or production modifications can alter normal behavior. Baselines should therefore be maintained through controlled processes and updated only after changes have been validated. Accurate baselines can improve anomaly detection while reducing unnecessary alerts caused by known operational activities.

Question 274

Which security principle limits a user’s ability to modify systems unrelated to their role?

1. Least privilege
2. Open access
3. Default trust
4. Anonymous administration

Correct Answer: 1

Explanation

Least privilege ensures that users receive only the permissions necessary for their assigned responsibilities. In OT environments, this principle can prevent an operator, technician, or vendor from accessing systems or functions that are unrelated to their role. Limiting permissions reduces the potential impact of compromised credentials and decreases the likelihood of accidental changes. Access should be based on documented requirements and reviewed periodically because job responsibilities can change. Least privilege is particularly important for administrative and engineering accounts because these accounts may have capabilities that can directly affect industrial configurations. Combined with strong authentication and logging, it provides an important layer of access protection.

Question 275

What is an important purpose of maintaining OT configuration backups?

1. To provide a recovery reference after accidental or unauthorized changes
2. To increase network latency
3. To permit unrestricted configuration changes
4. To eliminate access controls

Correct Answer: 3

Explanation

Configuration backups provide a known reference that can support recovery when an OT device experiences an unwanted or unauthorized change. Depending on the system, backups may include PLC logic, device parameters, firewall configurations, network settings, or other important information. Backups should be protected from unauthorized modification and maintained according to appropriate retention requirements. Recovery procedures should also be tested where safely possible because having a backup does not automatically guarantee successful restoration. Approved configuration versions should be clearly identified. Reliable backups can reduce recovery time after incidents and help organizations restore systems to a known state while minimizing operational disruption.

Question 276

Which event should receive attention during OT security monitoring?

1. A documented and approved maintenance activity
2. A new unauthorized connection to multiple critical controllers
3. A normal scheduled backup
4. A known HMI-to-PLC communication pattern

Correct Answer: 2

Explanation

An unauthorized connection involving multiple critical controllers can indicate potentially significant activity and should be investigated. Analysts should determine the source system, communication protocol, timing, and operational purpose of the connection. They should also check whether the activity corresponds to approved maintenance or engineering work. If no legitimate explanation exists, security teams can follow established incident response procedures and consider appropriate containment measures. Critical controllers deserve particular attention because changes or unauthorized interactions may affect industrial processes. Monitoring should therefore combine network visibility with accurate asset inventories, approved communication baselines, and operational schedules to distinguish genuine security concerns from legitimate industrial activity.

Question 277

What should be included in an OT incident response plan?

1. Defined roles, escalation procedures, containment options, and recovery processes
2. Only employee vacation schedules
3. Unrestricted administrator access
4. Instructions to delete all evidence

Correct Answer: 1

Explanation

An OT incident response plan should define how the organization will identify, assess, contain, investigate, and recover from cybersecurity incidents. Important elements include roles and responsibilities, escalation paths, communication procedures, evidence handling, containment options, recovery steps, and coordination with operational personnel. OT plans should account for the possibility that technical response actions can affect physical processes, availability, or safety. Contact information for relevant engineering and operational teams should be maintained. Exercises can help identify weaknesses before a real incident occurs. A well-prepared plan provides a structured framework for responding consistently while balancing cybersecurity objectives with industrial operational requirements.

Question 278

Why should security changes to production OT systems follow change-management procedures?

1. Because security changes can affect legitimate industrial communication and operations
2. Because documentation is never useful
3. Because testing increases cyber risk
4. Because all OT systems should remain unchanged forever

Correct Answer: 4

Explanation

Security changes can affect network connectivity, device behavior, performance, or communication between industrial components. Formal change management helps ensure that proposed modifications are reviewed, tested, approved, documented, and reversible when necessary. This reduces the possibility that a firewall rule, security policy, software update, or configuration change will unexpectedly interrupt an industrial process. Change procedures should involve appropriate technical and operational stakeholders and should include rollback plans for significant changes. Documentation also provides a record that can be reviewed during troubleshooting or incident investigation. Controlled change management allows organizations to improve security without introducing unnecessary operational instability.

Question 279

Which capability helps security teams understand relationships between OT assets?

1. Asset and network communication mapping
2. Office document formatting
3. Email forwarding
4. Printer configuration

Correct Answer: 3

Explanation

Asset and network communication mapping can show which OT devices communicate with each other and with supporting systems. This information helps security teams understand dependencies, identify unexpected connections, and design effective segmentation policies. Mapping can include controllers, HMIs, engineering workstations, servers, security devices, and other network components. Passive network observation can contribute valuable information without actively probing sensitive devices. Accurate mapping should be maintained as the environment changes because new equipment, maintenance activities, and network redesigns can alter communication relationships. Understanding these relationships is particularly important during incident response because it helps teams evaluate potential impact before taking containment actions.

Question 280

What is a key objective of a defense-in-depth strategy for OT security?

1. Depend on one security product for complete protection
2. Use multiple complementary security controls to reduce overall risk
3. Remove all network segmentation
4. Allow unrestricted access between security zones

Correct Answer: 2

Explanation

Defense in depth uses multiple complementary security controls so that the failure or compromise of one control does not leave the entire environment unprotected. In OT networks, this can include segmentation, firewalls, secure remote access, strong authentication, least privilege, asset visibility, passive monitoring, anomaly detection, configuration management, backups, and incident response. Each control addresses different aspects of the security problem. Defense in depth is particularly valuable in industrial environments because systems may include legacy technologies and operational constraints that prevent reliance on a single protection mechanism. A layered architecture can reduce attack paths, improve detection, and support more resilient response and recovery.