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

 

Question 221

Which OT security capability helps identify devices based on their observed network behavior?

1. Email filtering
2. File compression
3. Passive asset discovery
4. Password reset

Correct Answer: 3

Explanation

Passive asset discovery identifies devices by observing existing network communications rather than actively probing the devices. This approach is especially useful in OT environments because many industrial devices can be sensitive to unexpected network requests. By analyzing traffic, security platforms can often identify device types, addresses, communication protocols, and relationships between systems. This information improves asset visibility and helps security teams establish an understanding of the environment. Passive discovery does not replace configuration management or physical asset records, but it can reveal previously undocumented devices and communication paths. Maintaining accurate asset visibility is an important foundation for effective OT cybersecurity monitoring and risk management.

Question 222

What is the purpose of an industrial network security policy?

1. To define security requirements and acceptable communication for OT systems
2. To provide unrestricted access to controllers
3. To remove all authentication requirements
4. To disable security monitoring

Correct Answer: 4

Explanation

An industrial network security policy establishes the rules and requirements governing communication, access, monitoring, and protection of OT systems. It can define which systems are allowed to communicate, how remote access should be handled, what administrative controls are required, and how security events should be monitored. A well-designed policy should reflect the operational requirements of the industrial environment while reducing unnecessary exposure. Policies should also be documented, reviewed, and updated when network architecture or operational processes change. Consistent enforcement through firewalls, access controls, monitoring platforms, and other technologies helps turn documented security requirements into practical protections for industrial systems.

Question 223

Why is protocol awareness important when monitoring OT traffic?

1. It eliminates the need for segmentation
2. It allows security tools to understand industrial communication more accurately
3. It automatically repairs controllers
4. It provides unrestricted remote access

Correct Answer: 1

Explanation

Protocol awareness allows security tools to recognize and interpret communications used by industrial systems. OT environments may use protocols such as Modbus, DNP3, OPC, and other specialized technologies that have operational meanings beyond ordinary IP and port information. Understanding these protocols can help security teams identify expected communication and recognize unusual commands or relationships. Protocol-aware monitoring can therefore provide more meaningful visibility than basic network monitoring alone. It does not replace segmentation or access control, but it adds context that can improve detection and investigation. Security teams should understand the operational role of each protocol before applying restrictive security policies.

Question 224

Which approach is appropriate for managing administrative accounts on OT systems?

1. Use one shared password for all administrators
2. Give every operator full privileges
3. Allow permanent vendor administrator access
4. Use individual accounts with appropriate privileges and monitoring

Correct Answer: 2

Explanation

Administrative accounts should be managed carefully because they can provide powerful access to critical OT systems. Individual accounts improve accountability because actions can be associated with specific users. Permissions should follow the principle of least privilege so that administrators receive only the access necessary for their responsibilities. Strong authentication and appropriate logging can provide additional protection and visibility. Shared accounts make it difficult to determine who performed a particular action and can increase the impact of compromised credentials. Vendor accounts should also be controlled and disabled or restricted when not required. Regular account reviews can help identify unnecessary privileges and outdated access.

Question 225

What should an OT security team consider when selecting a monitoring deployment location?

1. Only the physical appearance of network equipment
2. The location of critical assets and important communication paths
3. The number of office employees
4. The size of the organization’s email mailbox

Correct Answer: 4

Explanation

The placement of OT monitoring sensors can significantly affect the visibility provided to security teams. Sensors should be positioned where they can observe important communication paths and critical assets while minimizing unnecessary operational impact. Teams may consider traffic between security zones, communications involving controllers, engineering workstations, HMIs, and connections crossing an industrial DMZ. Network architecture and available monitoring technologies also influence deployment decisions. A sensor placed where relevant traffic cannot be observed may provide limited security value. Monitoring architecture should therefore be planned using network diagrams, asset inventories, communication requirements, and operational knowledge rather than simply placing sensors at arbitrary locations.

Question 226

Which practice can help protect OT security management interfaces?

1. Exposing management interfaces directly to the Internet
2. Restricting management access to authorized systems and administrators
3. Allowing anonymous administrative access
4. Disabling authentication for convenience

Correct Answer: 3

Explanation

Management interfaces should be protected because they often provide powerful capabilities for configuring security devices and industrial infrastructure. Access should be restricted to authorized administrators and approved management systems. Network segmentation, strong authentication, role-based permissions, and logging can help reduce unauthorized access. Management interfaces should not normally be exposed directly to untrusted networks when safer controlled access methods are available. Administrative activity should also be monitored and reviewed where appropriate. Protecting management access is important because compromise of a security device or management platform could allow an attacker to modify policies, disable protections, or gain additional access to sensitive parts of the OT environment.

Question 227

What is a benefit of separating safety systems from general control networks where appropriate?

1. It can reduce the potential impact of security or operational incidents on safety functions
2. It eliminates all cybersecurity risks
3. It permits unrestricted communication
4. It removes the need for safety procedures

Correct Answer: 2

Explanation

Safety systems can have specialized responsibilities designed to protect people, equipment, and industrial processes. Where the architecture and applicable standards require separation, isolating safety-related systems from general control networks can reduce unnecessary communication and limit the potential impact of incidents. The exact architecture depends on the industrial process and safety requirements. Separation does not guarantee that safety systems cannot be affected by an incident, so appropriate controls and procedures remain necessary. Security teams should coordinate closely with safety and engineering personnel when designing protections because changes to network connectivity can have consequences for both cybersecurity and functional safety.

Question 228

Which indicator may suggest that an OT device has experienced an unexpected configuration change?

1. A scheduled backup completed successfully
2. An approved maintenance activity was documented
3. A configuration differs from the authorized baseline without a corresponding change record
4. Normal HMI-to-PLC communication continues

Correct Answer: 1

Explanation

An unexpected difference between an OT device’s current configuration and its approved baseline can indicate an unauthorized change, accidental modification, or undocumented maintenance activity. Configuration monitoring can help identify such differences and provide an opportunity for investigation. Analysts should compare the change against maintenance schedules, change-management records, and operational requirements before concluding that it is malicious. Maintaining approved configuration baselines is therefore useful for detecting deviations. Organizations should also protect baseline records from unauthorized modification. When a legitimate change occurs, the documentation and baseline should be updated through the appropriate change-management process so that future monitoring does not incorrectly classify the approved configuration as suspicious.

Question 229

Why can an industrial DMZ improve security between enterprise and OT networks?

1. It provides a controlled intermediary zone for required services
2. It gives every OT device direct Internet access
3. It eliminates firewall requirements
4. It removes all communication restrictions

Correct Answer: 3

Explanation

An industrial DMZ can provide an intermediary security zone between enterprise IT and sensitive OT networks. Services that legitimately need to exchange information can be positioned or mediated through this controlled area rather than creating direct connections into critical control networks. Firewalls can enforce specific communication policies between the enterprise, DMZ, and OT zones. Examples of services may include selected historians, update resources, or controlled remote-access infrastructure. The DMZ does not eliminate the need for security controls; instead, it provides another architectural layer for controlling communication. Its design should reflect actual business and operational requirements and should avoid unnecessary services or connectivity.

Question 230

Which action can help reduce false positives in OT anomaly detection?

1. Disable all detection rules
2. Remove asset information
3. Ignore operational changes
4. Maintain an accurate baseline of legitimate industrial behavior

Correct Answer: 1

Explanation

An accurate baseline helps anomaly detection distinguish expected industrial activity from unusual behavior. OT environments can generate repetitive and predictable communication patterns, making baseline information particularly useful. However, legitimate maintenance, production changes, software upgrades, and equipment replacements can alter normal behavior. Security teams should therefore maintain the baseline through controlled processes and validate changes before incorporating them. Simply disabling detection rules or ignoring alerts does not improve security. Combining behavioral monitoring with asset inventories, maintenance schedules, and operational context can reduce unnecessary alerts while preserving the ability to identify genuinely unusual activity. Baseline management should be treated as an ongoing security process.

Question 231

What is the main security advantage of restricting OT traffic by both source and destination?

1. It limits communication to defined systems and reduces unnecessary paths
2. It automatically encrypts all industrial protocols
3. It eliminates the need for monitoring
4. It allows unknown devices to communicate freely

Correct Answer: 4

Explanation

Restricting traffic according to both source and destination provides greater control over which systems can communicate. Instead of permitting an entire network segment to reach another segment, administrators can define specific communication relationships. For example, an approved engineering workstation may be permitted to reach particular controllers while unrelated systems remain blocked. This reduces unnecessary network paths and can limit lateral movement if a system becomes compromised. Additional restrictions can be applied based on ports and protocols. These policies should be based on documented operational requirements and reviewed periodically because industrial systems and communication dependencies may change during upgrades, maintenance, or expansion.

Question 232

Which component can provide controlled access for administrators who need to manage systems inside an OT network?

1. Public DNS server
2. Jump server or controlled management gateway
3. Internet-facing PLC
4. Unrestricted wireless hotspot

Correct Answer: 2

Explanation

A jump server or controlled management gateway can provide a defined access point for administrators who need to reach systems inside an OT environment. Instead of allowing direct connections from broad network segments, administrators can authenticate to the controlled gateway and then access only approved systems. This architecture can improve visibility and simplify enforcement of access policies. Depending on the design, sessions can be monitored or recorded, and access can be restricted by user, device, destination, and time. The gateway should itself be hardened and protected because it becomes an important security component. It should also be managed according to established access and change-management procedures.

Question 233

What should security teams do when an OT alert is generated for a potentially unusual event?

1. Investigate the event using technical and operational context
2. Immediately assume the device is malicious
3. Delete the alert
4. Disable the entire OT network

Correct Answer: 1

Explanation

An OT security alert should be investigated using both cybersecurity evidence and operational context. Analysts can examine network traffic, asset information, firewall logs, authentication records, configuration changes, and known maintenance activities. This helps determine whether the alert represents malicious activity, an operational change, a configuration issue, or another legitimate event. Immediately assuming that every anomaly is malicious can lead to unnecessary disruption, while ignoring alerts can allow genuine incidents to continue. OT incident investigation should involve appropriate engineering and operations personnel when necessary. A structured investigation process helps teams make informed containment decisions while protecting safety, availability, and valuable evidence.

Question 234

Why should security controls be tested against representative OT traffic before production deployment?

1. To increase the number of unauthorized connections
2. To determine whether the controls could disrupt legitimate industrial communication
3. To eliminate documentation requirements
4. To disable protocol inspection

Correct Answer: 4

Explanation

Security controls can affect network traffic in ways that are not immediately obvious from configuration settings alone. Testing against representative OT traffic can reveal whether firewall rules, protocol inspection, intrusion prevention, or other controls might block or alter legitimate industrial communication. This is especially important for sensitive or legacy devices. Testing should use appropriate environments and procedures that minimize operational risk. Security teams should document expected behavior, observe the results, and establish rollback procedures before deploying significant changes to production. Collaboration with engineering and operations teams can also help identify dependencies that security personnel may not otherwise recognize.

Question 235

Which characteristic makes OT environments different from many conventional IT environments?

1. OT systems often have strict availability, safety, and real-time operational requirements
2. OT systems never use networks
3. OT devices never require maintenance
4. OT environments cannot contain legacy technologies

Correct Answer: 2

Explanation

OT environments often operate equipment and processes where availability, reliability, safety, and timing can be critical. Many systems also have long operational lifecycles and may contain legacy technologies that were not originally designed with modern cybersecurity controls. These characteristics influence how security measures should be selected and deployed. An approach that is acceptable in a conventional IT environment may cause problems if applied directly to an industrial controller or safety-related system. OT security therefore requires coordination between cybersecurity teams and operational personnel. Security controls should be evaluated not only for their ability to reduce cyber risk but also for their potential effects on industrial operations.

Question 236

Which measure can help reduce exposure from obsolete OT software?

1. Publishing the system directly to the Internet
2. Removing all network controls
3. Applying appropriate compensating controls and planned upgrades where possible
4. Giving the system unrestricted administrative access

Correct Answer: 3

Explanation

Legacy and obsolete OT systems may not support modern security features or vendor security updates. When immediate replacement is not practical, organizations can use compensating controls such as network segmentation, restrictive firewall policies, limited administrative access, monitoring, and controlled remote access. These measures can reduce exposure while a longer-term modernization or replacement plan is developed. Organizations should also maintain accurate information about software and firmware versions so that unsupported assets can be identified and prioritized. Compensating controls do not eliminate the underlying limitations of obsolete technology, but they can reduce unnecessary exposure and provide additional protection until a sustainable upgrade or replacement becomes feasible.

Question 237

What is the purpose of reviewing OT firewall logs regularly?

1. To identify blocked, permitted, or unusual communication that may require investigation
2. To increase controller processing speed
3. To remove the need for segmentation
4. To automatically patch all industrial devices

Correct Answer: 4

Explanation

Firewall logs provide visibility into communication attempts between network zones. Reviewing these records can help security teams identify blocked connections, unexpected sources, unusual destinations, repeated access attempts, or changes in normal communication patterns. This information can support incident investigation and help identify overly broad or outdated firewall policies. Log review should be combined with asset information and operational knowledge because not every unusual connection is malicious. Automated alerting can help identify significant events, while periodic policy reviews ensure that firewall rules remain aligned with current requirements. Proper log retention and time synchronization also improve the usefulness of firewall records during investigations.

Question 238

Which action best supports accountability for privileged OT administrative activity?

1. Using anonymous accounts
2. Sharing one administrator account
3. Using individual identities and recording administrative actions
4. Disabling authentication logs

Correct Answer: 1

Explanation

Individual administrator identities provide stronger accountability than shared or anonymous accounts. When each administrator uses a unique identity, security teams can associate actions with the appropriate user and investigate potentially unauthorized changes more effectively. Privileged activity should be logged where technically and operationally appropriate, with logs protected against unauthorized modification. Strong authentication and least-privilege permissions can provide additional protection. Shared administrative credentials make investigations more difficult and increase the impact if the password is compromised. OT environments may have special operational requirements, so account-management controls should be implemented carefully without disrupting essential maintenance or emergency procedures.

Question 239

What should be included in an OT cybersecurity risk assessment?

1. Only the organization’s email systems
2. Critical assets, threats, vulnerabilities, consequences, and existing controls
3. Only the number of employees
4. Only Internet bandwidth measurements

Correct Answer: 2

Explanation

An OT cybersecurity risk assessment should consider the assets that support industrial operations, relevant threats and vulnerabilities, potential consequences, and the controls already in place. The assessment should consider both cybersecurity and operational factors because an incident can affect production, safety, availability, or equipment. Asset criticality and communication dependencies are particularly important when prioritizing risks. Existing safeguards such as segmentation, authentication, monitoring, backups, and incident response capabilities should also be evaluated. Risk assessments should be reviewed when significant changes occur, including new equipment, network architecture changes, software upgrades, or changes in operational processes. This supports informed security planning and prioritization.

Question 240

Which approach is appropriate when integrating new OT equipment into an existing secure network?

1. Connect it directly to the Internet for testing
2. Give it unrestricted access to all network segments
3. Skip asset documentation
4. Validate its communication requirements and apply appropriate security controls before deployment

Correct Answer: 3

Explanation

New OT equipment should be integrated through a controlled process that considers its operational role, communication requirements, security configuration, and dependencies. Before deployment, teams should identify which systems the device needs to communicate with and restrict unnecessary connectivity. The device should be documented in the asset inventory and placed in the appropriate security zone. Where possible, default credentials should be changed and unnecessary services disabled according to vendor guidance and operational requirements. Testing should confirm that required industrial functions work correctly without introducing unexpected communication paths. A controlled onboarding process helps ensure that new equipment strengthens the environment rather than creating an undocumented security exposure.