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

 

Question 241

Which feature is useful for identifying unusual communication between OT devices?

1. Network traffic analysis
2. Email archiving
3. File compression
4. Printer management

Correct Answer: 4

Explanation

Network traffic analysis provides visibility into communication patterns between OT devices and systems. By examining sources, destinations, protocols, ports, and communication frequency, security teams can establish an understanding of normal industrial behavior. Unexpected communication may indicate a configuration issue, unauthorized activity, malware, or a legitimate operational change that requires validation. OT traffic analysis is particularly valuable because industrial networks often have predictable communication relationships. Security teams should combine traffic observations with asset inventories and operational schedules before determining whether an event is suspicious. Proper analysis can support early detection while minimizing the need for intrusive scanning of sensitive industrial devices.

Question 242

What is the main objective of applying least privilege to an OT operator account?

1. To provide unrestricted administrative access
2. To give the account only the permissions required for assigned duties
3. To eliminate authentication
4. To allow access to every OT device

Correct Answer: 2

Explanation

Least privilege limits an account to the permissions required for its legitimate responsibilities. In an OT environment, operators may need to view process information or perform specific control functions without requiring administrative access to operating systems, network devices, or engineering tools. Restricting permissions reduces the potential impact if credentials are compromised or misused. Access should be based on documented job responsibilities and reviewed periodically. Organizations can further strengthen privileged access through individual accounts, strong authentication, logging, and controlled administrative pathways. Least privilege should be implemented carefully so that required operational tasks remain available and emergency procedures are not unnecessarily obstructed.

Question 243

Which protocol is commonly associated with communication between industrial automation components?

1. Modbus
2. IMAP
3. SMTP
4. POP3

Correct Answer: 1

Explanation

Modbus is a widely used industrial communication protocol found in many automation environments. It can be implemented over serial communications or TCP/IP networks and is commonly used for exchanging process and control information between industrial devices. Traditional Modbus implementations generally provide limited security capabilities compared with modern enterprise protocols, making surrounding security controls important. Network segmentation, access restrictions, monitoring, and protocol-aware security inspection can help reduce exposure. Security teams should understand which industrial protocols are present in their environment because protocol knowledge improves asset identification and helps analysts recognize unusual communications or commands. OT security requires consideration of both network behavior and operational function.

Question 244

What is an important benefit of using an industrial DMZ between IT and OT?

1. It allows unrestricted access to PLCs
2. It removes the need for firewall rules
3. It provides a controlled location for services that must communicate across zones
4. It connects all industrial devices directly to the Internet

Correct Answer: 3

Explanation

An industrial DMZ provides a controlled intermediary zone between enterprise IT and sensitive OT networks. Services that require communication across the boundary can be placed in or accessed through this zone while firewall policies restrict direct connectivity to critical control networks. Depending on the architecture, the DMZ may support services such as selected historians, remote-access infrastructure, or controlled update resources. The purpose is not to provide unrestricted connectivity but to create an additional security boundary. Effective implementation requires carefully documented communication requirements and restrictive policies. The industrial DMZ should also be monitored because systems located within it can become important points of interaction between enterprise and industrial environments.

Question 245

Why is passive monitoring often preferred for discovering assets in sensitive OT networks?

1. It avoids generating potentially disruptive scanning traffic
2. It automatically patches every discovered device
3. It removes the need for network segmentation
4. It guarantees that every vulnerability is fixed

Correct Answer: 4

Explanation

Passive monitoring observes existing network traffic rather than actively sending large numbers of discovery requests to devices. This can be advantageous in OT environments where legacy or specialized equipment may respond unpredictably to unexpected traffic. Passive monitoring can identify devices, communication relationships, protocols, and behavioral patterns while minimizing interaction with industrial systems. It does not guarantee complete asset discovery because devices that generate little or no observable network traffic may require other inventory methods. Passive visibility should therefore complement physical records, configuration management, and approved discovery processes. Its main benefit is providing useful network intelligence while reducing the operational risks associated with aggressive active scanning.

Question 246

Which control can help prevent unauthorized communication from an enterprise network to a PLC segment?

1. Public email service
2. Industrial firewall with restrictive policies
3. Office printer
4. Web browser configuration

Correct Answer: 1

Explanation

An industrial firewall can enforce communication boundaries between enterprise networks and PLC segments. Security administrators can define approved source and destination systems, protocols, ports, and communication directions. Restrictive policies help prevent unnecessary enterprise systems from reaching critical controllers and reduce possible attack paths. Firewall deployment should be based on documented industrial communication requirements because blocking legitimate traffic could affect operations. Logging should also be enabled where appropriate so that attempted and permitted connections can be investigated. Firewalls work best as part of a layered OT security architecture that includes segmentation, monitoring, strong access controls, secure remote access, and incident response procedures.

Question 247

What should be done with unused network services on an OT device when operationally safe?

1. Enable additional services for flexibility
2. Expose the services externally
3. Disable unnecessary services to reduce the attack surface
4. Share administrative credentials

Correct Answer: 2

Explanation

Unnecessary services increase the number of functions that could potentially be exploited or misused. If a service is not required for the device’s operational role, disabling it can reduce the attack surface. However, OT devices may have undocumented dependencies, so changes should be validated against vendor documentation and operational requirements. Security teams should use formal change-management procedures before modifying production equipment. Required services should be protected through appropriate access controls and network restrictions. Hardening should be performed carefully because an apparently unnecessary service may support a maintenance or monitoring function. The goal is to reduce exposure without disrupting required industrial functionality.

Question 248

Which information is most useful when determining whether an OT communication is legitimate?

1. The color of the device
2. The office seating arrangement
3. The employee’s browser preference
4. The expected source, destination, protocol, and operational purpose

Correct Answer: 3

Explanation

Determining whether OT communication is legitimate requires understanding why the communication exists and whether it matches documented industrial requirements. Useful information includes the source and destination devices, protocol, ports, communication direction, timing, and operational purpose. For example, an engineering workstation communicating with a controller during scheduled maintenance may be expected, while the same communication from an unknown workstation could require investigation. Security teams should compare observed traffic with network documentation, asset inventories, maintenance schedules, and known communication baselines. Context is important because unusual traffic is not automatically malicious. Combining technical and operational information produces more reliable security analysis.

Question 249

What is the purpose of maintaining an approved OT configuration baseline?

1. To provide a reference for detecting unauthorized or unexpected changes
2. To allow unrestricted configuration modifications
3. To remove the need for backups
4. To disable change management

Correct Answer: 2

Explanation

An approved configuration baseline represents the expected state of an OT device or system. Comparing the current configuration with the approved baseline can help identify unauthorized modifications, accidental changes, or undocumented maintenance. Baselines may include network settings, security policies, software versions, device parameters, or other relevant configuration information. They should be protected from unauthorized modification and updated through controlled change-management processes when legitimate changes are approved. Configuration monitoring can provide valuable evidence during investigations and can also support recovery activities. Maintaining accurate baselines is particularly important in OT environments because configuration changes can affect both cybersecurity and industrial process behavior.

Question 250

Which practice improves accountability for privileged access to OT systems?

1. Using anonymous administrator accounts
2. Sharing one account among all technicians
3. Using unique administrator identities with appropriate logging
4. Disabling authentication records

Correct Answer: 1

Explanation

Unique administrator identities improve accountability because actions can be associated with specific individuals. This makes it easier to investigate configuration changes, troubleshoot problems, and determine whether privileged activity was authorized. Administrative privileges should be assigned according to job requirements and reviewed regularly. Authentication and administrative activity logs can provide additional visibility, provided they are protected and retained appropriately. Shared accounts make attribution difficult and can increase risk if credentials are compromised. Where operational requirements make shared technical accounts unavoidable, additional compensating controls should be considered. Strong identity management is therefore an important part of protecting high-privilege access in OT environments.

Question 251

Which security measure can help limit lateral movement after an OT workstation is compromised?

1. Network segmentation and restrictive inter-zone policies
2. Unrestricted routing
3. Direct Internet connectivity
4. Shared administrator credentials

Correct Answer: 4

Explanation

Network segmentation can limit the ability of a compromised workstation to communicate with unrelated OT systems. By dividing the environment into security zones and controlling traffic between them, organizations can reduce unnecessary paths that an attacker might use for lateral movement. Firewall policies can restrict communication to known and required relationships. Additional protections such as least privilege, endpoint monitoring, and strong authentication can further reduce the impact of a compromised workstation. Segmentation should be based on the actual industrial architecture and operational dependencies. It is most effective when combined with monitoring that can identify unexpected communication attempts across established security boundaries.

Question 252

Why should OT incident response procedures involve operations personnel?

1. Operations personnel are responsible for email filtering
2. They understand industrial processes and the potential operational impact of response actions
3. They replace cybersecurity teams
4. They eliminate the need for incident documentation

Correct Answer: 2

Explanation

Operations personnel understand how industrial systems support physical processes and can provide important information during a cybersecurity incident. A response action that appears appropriate from a purely technical perspective could affect production, equipment, or safety if performed without operational knowledge. Collaboration allows security teams to evaluate containment and recovery options with a better understanding of system dependencies. Operations personnel can also help determine whether unusual activity corresponds to planned maintenance or process changes. Incident response should therefore involve appropriate cybersecurity, engineering, operations, and safety stakeholders. Clearly defined roles and escalation procedures help ensure that decisions are coordinated and documented during an incident.

Question 253

What can an OT security platform use to identify potentially abnormal device behavior?

1. Only employee names
2. Network and asset behavior observed over time
3. Office printer settings
4. Social media accounts

Correct Answer: 3

Explanation

OT security platforms can analyze observed network and asset behavior to establish patterns associated with normal operation. Information may include communication partners, industrial protocols, connection frequency, ports, commands, and other available characteristics. When behavior changes significantly, the platform can generate an alert for investigation. Effective detection depends on accurate asset identification and reliable baselines. Analysts should consider operational context before determining whether an alert represents a threat. Scheduled maintenance and legitimate engineering activities can produce unusual behavior that is not malicious. Behavioral monitoring is therefore most effective when combined with network segmentation, asset inventories, change management, and knowledgeable investigation processes.

Question 254

Which action is appropriate when granting temporary remote access to an OT vendor?

1. Provide permanent unrestricted access
2. Disable all logging
3. Use a controlled access method with defined scope and duration
4. Publish the OT system directly on the Internet

Correct Answer: 4

Explanation

Temporary vendor access should be limited to the systems and functions required for the approved maintenance task. A controlled access mechanism can enforce authentication, authorization, time restrictions, and network boundaries while providing useful visibility into the session. Access should normally be enabled only when required and removed or disabled afterward. Logging can help establish accountability and support later investigation. Directly exposing industrial systems to the Internet creates unnecessary risk and should be avoided when safer access architectures are available. Vendor access procedures should also include approval, documentation, and coordination with operations teams so that remote activities do not interfere with active industrial processes.

Question 255

What is an important reason to monitor traffic involving engineering workstations?

1. They may have privileged capabilities for modifying industrial configurations
2. They cannot communicate with controllers
3. They are always isolated from OT networks
4. They only perform office productivity tasks

Correct Answer: 2

Explanation

Engineering workstations may have specialized software and privileges that allow personnel to configure controllers, modify logic, troubleshoot equipment, or perform maintenance. Because of these capabilities, unexpected activity from an engineering workstation can have significant security implications. Monitoring can help identify unusual connections, unexpected protocol use, or communication with systems that are outside the workstation’s normal role. Security teams should understand scheduled engineering activities so that legitimate maintenance does not create unnecessary alerts. Strong access control, segmentation, endpoint protection where appropriate, and controlled remote access can further protect these systems. Their privileged role makes them important components of an OT security strategy.

Question 256

Which activity helps validate that OT recovery procedures are effective?

1. Removing configuration backups
2. Conducting controlled recovery exercises
3. Disabling incident response documentation
4. Avoiding system testing

Correct Answer: 1

Explanation

Controlled recovery exercises help organizations determine whether documented recovery procedures actually work under realistic conditions. Exercises can test the availability of backups, configuration records, communication procedures, responsibilities, and technical recovery steps. OT recovery testing must be carefully planned because production systems may be sensitive to changes. Where possible, testing can occur in suitable non-production or representative environments before being applied to operational systems. Lessons learned should be documented and used to improve procedures. Recovery plans should address not only cybersecurity restoration but also operational validation so that systems are returned to service safely and according to approved industrial requirements.

Question 257

Which factor should be considered when selecting an OT firewall rule?

1. Only the device’s physical color
2. The required industrial communication between specific systems
3. The number of office chairs
4. The employee’s preferred operating system

Correct Answer: 4

Explanation

Firewall rules should reflect legitimate communication requirements within the industrial environment. Administrators should understand which systems need to communicate, what protocols and ports are required, and whether communication needs to occur in one or both directions. Rules should be as specific as practical to minimize unnecessary connectivity. Broad policies may expose critical systems, while overly restrictive policies can interrupt operations. Security teams should document and test changes before production deployment. Firewall logs can then be used to verify expected behavior and identify unexpected communication attempts. Regular policy reviews are also important because industrial architectures can change over time.

Question 258

What is a benefit of correlating alerts from multiple OT security controls?

1. It removes the need for investigation
2. It automatically guarantees that every alert is malicious
3. It can provide broader context about a potential security event
4. It disables network monitoring

Correct Answer: 3

Explanation

Correlating information from multiple security controls can provide a more complete view of an event. For example, a firewall alert combined with an unusual endpoint event and an unexpected controller communication may provide stronger investigative context than any individual alert. Centralized monitoring platforms can help analysts identify relationships between events occurring across different systems. Correlation does not automatically prove that an incident has occurred, so analysts must still validate events using asset information and operational context. Effective correlation can reduce investigation time, highlight patterns, and help security teams prioritize events that may represent meaningful changes in the behavior of OT systems.

Question 259

Which practice can help protect security logs from being altered by unauthorized users?

1. Applying access controls and appropriate centralized log protection
2. Giving every user administrative access
3. Disabling log retention
4. Allowing anonymous log management

Correct Answer: 1

Explanation

Security logs can contain important evidence about authentication, network activity, configuration changes, and security events. Protecting them from unauthorized modification helps preserve their reliability during investigations. Organizations can use access controls, centralized collection, restricted administrative permissions, appropriate retention policies, and other mechanisms to protect logs. Centralized logging can also reduce dependence on the local storage of an individual device. Log protection should be balanced with OT performance and storage requirements. Accurate timestamps and reliable time synchronization further improve the value of logs because analysts can correlate events across multiple systems when investigating suspicious activity.

Question 260

What is an important goal of OT cybersecurity monitoring?

1. To increase the number of unknown devices
2. To provide visibility into security-relevant activity while supporting safe operations
3. To disable all industrial communication
4. To replace every operational process with IT systems

Correct Answer: 4

Explanation

OT cybersecurity monitoring aims to provide visibility into network and system activity so that security teams can identify unexpected behavior, investigate incidents, and maintain awareness of the environment. Monitoring should be designed with the operational characteristics of industrial systems in mind. Excessively intrusive techniques can create unnecessary risks, while insufficient visibility can leave important activity undetected. Effective monitoring can include asset discovery, traffic analysis, protocol awareness, anomaly detection, firewall logging, and centralized event management. The goal is not simply to collect the largest possible amount of data but to obtain useful security information while preserving the reliability, availability, and safety requirements of industrial operations.