2026 Updated Verified Pass ISA-IEC-62443 Exam - Real Questions and Answers
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NEW QUESTION # 42
Which steps are included in the ISA/IEC 62443 assess phase?
Available Choices (select all choices that are correct)
- A. Cybersecurity requirements specification and allocation of IACS assets to zones and conduits
- B. Allocation of IACS assets to zones and conduits, and detailed cyber risk assessment
- C. Detailed cyber risk assessment and cybersecurity maintenance, monitoring, and management of change
- D. Cybersecurity requirements specification and detailed cyber risk assessment
Answer: A
NEW QUESTION # 43
Which of the following is an element of security policy, organization, and awareness?
Available Choices (select all choices that are correct)
- A. Penetration testing
- B. Staff training and security awareness
- C. Technical requirement assessment
- D. Product development requirements
Answer: B
Explanation:
According to the ISA/IEC 62443-2-1 standard, security policy, organization, and awareness is one of the four foundational requirements for an IACS security management system. It defines the "policies, procedures, and organizational structure necessary to support the security program" 1. One of the elements of this requirement is staff training and security awareness, which involves "providing appropriate security education and training to all personnel who have access to or are responsible for IACS components" 1. This element aims to ensure that the staff are aware of the security risks, policies, and procedures, and are able to perform their roles and responsibilities in a secure manner. Staff training and security awareness can include topics such as security principles, threats and vulnerabilities, incident response, password management, physical security, and social engineering 2. References:
* ISA/IEC 62443 Series of Standards - ISA
* Security of Industrial Automation and Control Systems - ISAGCA
NEW QUESTION # 44
Which of the following refers to internal rules that govern how an organization protects critical system resources?
Available Choices (select all choices that are correct)
- A. Legislation
- B. Formal guidance
- C. Security policy
D- Code of conduct
Answer: C
Explanation:
A security policy refers to internal rules that govern how an organization protects critical system resources, such as industrial control systems (ICS). A security policy defines the objectives, scope, roles, responsibilities, and requirements for securing the ICS environment, as well as the procedures and guidelines for implementing, monitoring, and enforcing the security measures. A security policy also establishes the baseline for assessing and managing the security risks to the ICS, and for ensuring compliance with relevant standards, regulations, and best practices. A security policy is a key component of the ICS security program, and it should be documented, communicated, and reviewed regularly.
The other choices are not correct because:
* A. Formal guidance. Formal guidance refers to external sources of information and recommendations that can help an organization improve its ICS security posture, such as standards, frameworks, guidelines, and best practices. Formal guidance is not an internal rule, but rather a reference that can be used to develop, implement, and evaluate the security policy and controls. For example, the ISA/IEC
62443 series of standards provide formal guidance on how to secure ICS from cyber threats1.
* B. Legislation. Legislation refers to external laws and regulations that impose legal obligations and penalties on an organization for its ICS security performance, such as the NERC CIP standards for the electric sector2, or the EU NIS Directive for critical infrastructure operators3. Legislation is not an internal rule, but rather a compliance requirement that must be met by the organization. Legislation may also influence the security policy and controls, as the organization needs to align its security objectives and practices with the legal expectations and consequences.
* D. Code of conduct. A code of conduct refers to a set of ethical principles and values that guide the
* behavior and decision-making of an organization and its employees, such as honesty, integrity, respect, and accountability. A code of conduct is not an internal rule for protecting critical system resources, but rather a general norm for conducting business and maintaining a positive reputation. A code of conduct may also support the security policy and culture, as it can foster a sense of responsibility and trust among the ICS stakeholders.
References:
* 1: ISA/IEC 62443 Standards to Secure Your Industrial Control System
* 2: NERC Critical Infrastructure Protection Standards
* 3: EU Network and Information Systems Directive
NEW QUESTION # 45
Which statement is TRUE reqardinq application of patches in an IACS environment?
Available Choices (select all choices that are correct)
- A. Patches should be applied based on the organization's risk assessment.
- B. Patches should be applied as soon as they are available.
- C. Patches should be applied within one month of availability.
- D. Patches never should be applied in an IACS environment.
Answer: A
NEW QUESTION # 46
Which of the following BEST describes 'Vulnerability'?
- A. An exploitable flaw in management
- B. An event that could breach security
- C. The result that occurs from a particular incident
- D. The potential for violation of security
Answer: D
Explanation:
According to ISA/IEC 62443-1-1, a vulnerability is defined as "the potential for violation of security," which means a weakness or gap in protection efforts that could be exploited by threats to gain unauthorized access or cause harm to an IACS. It does not specifically mean an event (B) or a result (D), and it is broader than just management flaws (A). The identification and management of vulnerabilities are key steps in risk assessment and mitigation in the 62443 framework.
Reference: ISA/IEC 62443-1-1:2007, Section 3.3, Glossary ("vulnerability" definition).
NEW QUESTION # 47
If an asset owner wants to improve their organization's ability to respond during a cyberattack, which of the following activities would be MOST appropriate to implement?
- A. Architecture awareness workshops
- B. Anomaly detection drills for operators
- C. Tabletop exercises
- D. Password hygiene campaign
Answer: C
Explanation:
Tabletop exercises simulate cybersecurity incidents in a non-disruptive setting, helping teams test and improve their incident response plans and communication protocols.
"Tabletop exercises allow personnel to rehearse roles, responsibilities, and actions in a simulated event scenario. This enhances coordination, preparedness, and decision-making during actual incidents."
- ISA/IEC 62443-2-1:2010, Clause 4.3.3.3 - Incident Response Preparedness They are essential for verifying that the incident handling process (SP Element 7) is both understood and effective.
References:
ISA/IEC 62443-2-1:2010 - Clause 4.3.3.3
NIST SP 800-61 - Computer Security Incident Handling Guide
NEW QUESTION # 48
What port number is used by MODBUS TCP/IP for communication?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: C
Explanation:
ISA/IEC 62443 frequently references common industrial protocols when discussing network security, segmentation, and secure communications. MODBUS TCP/IP is one of the most widely deployed industrial protocols and is explicitly recognized as operating over TCP port 502.
Step 1: Protocol context
MODBUS TCP/IP is the Ethernet-based adaptation of the MODBUS protocol, enabling communication between PLCs, HMIs, and SCADA systems over IP networks. Unlike HTTP or HTTPS, MODBUS does not include native authentication or encryption.
Step 2: Port assignment
The standard TCP port assigned to MODBUS TCP/IP is 502, which is well known and commonly targeted by attackers. ISA/IEC 62443 highlights that well-known ports increase exposure and therefore require compensating controls such as firewalls, segmentation, and deep packet inspection.
Step 3: Security implications
Because port 502 traffic can carry control commands directly affecting physical processes, the standard emphasizes controlling and monitoring communications using this port within defined zones and conduits.
Step 4: Why other options are incorrect
* Port 21 is used for FTP
* Port 80 for HTTP
* Port 443 for HTTPS
Thus, the correct and standards-aligned answer is 502.
NEW QUESTION # 49
Why is patch management more difficult for IACS than for business systems?
Available Choices (select all choices that are correct)
- A. Patching a live automation system can create safety risks.
- B. Business systems automatically update.
- C. Overtime pay is required for technicians.
- D. Many more approvals are required.
Answer: A
Explanation:
Patch management is the process of applying software updates to fix security vulnerabilities, improve functionality, or enhance performance. Patch management is an essential part of cybersecurity, as unpatched systems can be exploited by malicious actors. However, patch management for industrial automation and control systems (IACS) is more challenging than for business systems, because patching a live automation system can create safety risks. According to the ISA/IEC 62443 standards, patching an IACS may have the following potential impacts1:
* Patching may introduce new vulnerabilities or errors that compromise the availability, integrity, or confidentiality of the IACS.
* Patching may affect the functionality or performance of the IACS, causing unexpected or undesired behavior, such as process shutdowns, slowdowns, or failures.
* Patching may require downtime or reduced operation of the IACS, which may affect production, quality, or profitability.
* Patching may require additional resources, such as personnel, equipment, or testing facilities, which may not be readily available or affordable.
Therefore, patch management for IACS requires careful planning, testing, and validation before applying patches to the operational environment. The ISA/IEC 62443 standards provide guidance and best practices for patch management in the IACS environment, such as1:
* Establishing a patch management program that defines roles, responsibilities, policies, and procedures for patching IACS components and systems.
* Identifying and prioritizing the IACS assets that need patching, based on their criticality, vulnerability, and risk level.
* Evaluating and verifying the patches for compatibility, functionality, and security before applying them to the IACS.
* Implementing and documenting the patching process, including backup, recovery, and rollback procedures, in case of patch failure or adverse effects.
* Monitoring and auditing the patching activities and outcomes, and reporting any issues or incidents.
References: 1: ISA TR62443-2-3 - Security for industrial automation and control systems, Part 2-3: Patch management in the IACS environment
NEW QUESTION # 50
Which steps are part of implementing countermeasures?
Available Choices (select all choices that are correct)
- A. Establish the risk tolerance and update the business continuity plan.
- B. Select common countermeasures and update the business continuity plan.
- C. Establish the risk tolerance and select common countermeasures.
- D. Select common countermeasures and collaborate with stakeholders.
Answer: C
NEW QUESTION # 51
What is a commonly used protocol for managing secure data transmission over a Virtual Private Network
(VPN)?
Available Choices (select all choices that are correct)
- A. IPSec
- B. MPLS
- C. HTTPS
- D. SSH
Answer: A
NEW QUESTION # 52
A plant has several zones including business, safety-critical, and wireless zones. According to ISA/IEC
62443, how should these zones be managed during risk assessment?
- A. Combine all zones into one for simplicity.
- B. Ignore physical location when grouping assets.
- C. Treat temporarily connected devices as part of the safety zone permanently.
- D. Establish clear separation between zones based on criticality.
Answer: D
Explanation:
ISA/IEC 62443 defines zones and conduits as a core architectural concept for managing cybersecurity risk in IACS environments. During risk assessment, zones must be clearly separated based on risk, function, and criticality, not convenience.
Step 1: Definition of zones in ISA/IEC 62443
A zone is a grouping of assets that share similar security requirements and risk profiles. Business systems, safety-critical control systems, and wireless systems inherently have different threat exposures and consequences of compromise.
Step 2: Risk-based separation principle
ISA/IEC 62443-3-2 requires that risk assessments identify differences in impact and threat likelihood. Safety- critical zones typically require higher Security Levels due to potential impacts on human safety and the environment. Business zones, by contrast, tolerate different risk levels.
Step 3: Purpose of separation
Clear separation ensures that security requirements can be applied appropriately to each zone. It also limits the propagation of attacks from lower-criticality zones (such as business or wireless networks) into higher- criticality zones.
Step 4: Why other options are incorrect
* Combining all zones ignores risk differentiation and violates the core zone concept.
* Ignoring physical location is incorrect; while zones are logical, physical access and connectivity still matter in risk assessment.
* Treating temporary connections as permanent safety assets distorts the risk model and security requirements.
Step 5: Outcome of proper zone management
By establishing clear separation based on criticality, asset owners can correctly assign Security Levels, define conduits, and apply appropriate technical and procedural controls.
Therefore, ISA/IEC 62443 requires clear separation between zones based on criticality during risk assessment.
NEW QUESTION # 53
According to the scheme for cybersecurity profiles, which of the following is true about ISA/IEC 62443 security requirements when creating a security profile?
- A. Existing security requirements can be modified to fit sector needs.
- B. No new requirements are added and existing ones are not modified.
- C. Only foundational requirements can be changed.
- D. New security requirements can be added freely.
Answer: B
Explanation:
ISA/IEC TR 62443-1-5 defines the rules for creating cybersecurity profiles. The key principle is preservation of standard integrity.
Step 1: Purpose of profiles
Profiles allow selection and scoping of existing requirements for specific industries or applications.
Step 2: Restriction on modification
The technical report explicitly states that no new security requirements may be added, and existing requirements must not be altered. This ensures interoperability, auditability, and certification consistency.
Step 3: Correct approach
Profiles may select, exclude, or contextualize requirements, but they cannot redefine them.
Therefore, Option C is correct.
NEW QUESTION # 54
What is the primary purpose of the NIST Cybersecurity Framework (CSF)?
- A. To create new cybersecurity technologies
- B. To provide a certification for organizations
- C. To replace existing cybersecurity standards
- D. To enhance the resilience of critical infrastructure
Answer: D
Explanation:
The primary goal of the NIST Cybersecurity Framework (CSF) is to help organizations enhance the security and resilience of critical infrastructure and reduce cybersecurity risks through a structured, risk-based approach.
"The Framework provides a policy framework of computer security guidance for how private sector organizations in the United States can assess and improve their ability to prevent, detect, and respond to cyber attacks. It is intended to enhance the resilience of critical infrastructure."
- NIST CSF v1.1, Section 1.0 - Overview
The NIST CSF does not create new standards or certify organizations - it references existing standards and guides implementation in a flexible and sector-neutral way.
References:
NIST Cybersecurity Framework v1.1 - Section 1
ISA/IEC 62443-2-1 - Mapping to NIST CSF
NEW QUESTION # 55
Which of the following ISA-99 (IEC 62443) Reference Model levels is named correctly?
Available Choices (select all choices that are correct)
- A. Level 2: Quality Control
- B. Level 4: Process
- C. Level 3: Operations Management
- D. Level 1: Supervisory Control
Answer: C
Explanation:
The ISA-99/IEC 62443 standards for industrial automation and control systems security categorize network and system components into different levels based on their operational context. The correct name from the provided options for one of these levels is Level 3: Operations Management. This level typically encompasses systems that manage production control systems, including batch management, production scheduling, and overall factory operations. The other levels listed, such as Supervisory Control and Process, refer to different aspects of the system but are not named correctly in the options provided. Level 1 is correctly referred to as
"Basic Control," and Level 4 should be "Business Logistics" instead of "Process."
NEW QUESTION # 56
Which is the PRIMARY reason why Modbus over Ethernet is easy to manaqe in a firewall?
Available Choices (select all choices that are correct)
- A. Modbus is a proprietary protocol that is widely supported by vendors.
- B. Modbus uses a single master to communicate with multiple slaves usinq simple commands.
- C. Modbus has no known security vulnerabilities, so firewall rules are simple to implement.
- D. Modbus uses explicit source and destination IP addresses and a sinqle known TCP port.
Answer: D
Explanation:
According to the ISA/IEC 62443-2-4 standard, a training and security awareness program should include all personnel who have access to the industrial automation and control system (IACS) or who are involved in its operation, maintenance, or management. This includes vendors and suppliers, employees, temporary staff, contractors, and visitors. The purpose of the program is to ensure that all personnel are aware of the security risks and policies related to the IACS, and that they have the necessary skills and knowledge to perform their roles in a secure manner. The program should also cover the roles and responsibilities of different personnel, the reportingprocedures for security incidents, and the best practices for security hygiene. References:
* ISA/IEC 62443-2-4:2015 - Security for industrial automation and control systems - Part 2-4: Security program requirements for IACS service providers1
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Training Course2
NEW QUESTION # 57
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to follow?
- A. If a high priority, apply the patch at the first unscheduled outage.
- B. If a low priority, there is no need to apply the patch.
- C. If a medium priority, schedule the installation within three months after receipt.
- D. If no problems are experienced with the current IACS, it is not necessary to apply the patch.
Answer: A
Explanation:
According to the ISA/IEC 62443 Cybersecurity Fundamentals Specialist resources, patches are software updates that fix bugs, vulnerabilities, or improve performance of a system. Patches are classified into three categories based on their urgency and impact: low, medium, and high. Low priority patches are those that have minimal or no impact on the system functionality or security, and can be applied at the next scheduled maintenance. Medium priority patches are those that have moderate impact on the system functionality or security, and should be applied within a reasonable time frame, such as three months. High priority patches are those that have significant or critical impact on the system functionality or security, and should be applied as soon as possible, preferably at the first unscheduled outage. Applying patches in a timely manner is a best practice for maintaining the security and reliability of an industrial automation and control system (IACS). References:
ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 4.3.2, Patch Management ISA/IEC 62443-2-1:2009, Security for industrial automation and control systems - Part 2-1: Establishing an industrial automation and control systems security program, Clause 5.3.2.2, Patch management ISA/IEC 62443-3-3:2013, Security for industrial automation and control systems - Part 3-3: System security requirements and security levels, Clause 4.3.3.6.2, Patch management
NEW QUESTION # 58
Which of the following is the BEST reason for periodic audits?
Available Choices (select all choices that are correct)
- A. To validate that security policies and procedures are performing
- B. To meet regulations
- C. To confirm audit procedures
- D. To adhere to a published or approved schedule
Answer: A
Explanation:
Periodic audits are an essential part of the ISA/IEC 62443 cybersecurity standards, as they help to verify the effectiveness and compliance of the security program. According to the ISA/IEC 62443-2-1 standard, periodic audits should be conducted to evaluate the following aspects1:
* The security policies and procedures are consistent with the security requirements and objectives of the organization
* The security policies and procedures are implemented and enforced in accordance with the security program
* The security policies and procedures are reviewed and updated regularly to reflect changes in the threat landscape, the IACS environment, and the business needs
* The security performance indicators and metrics are measured and reported to the relevant stakeholders
* The security incidents and vulnerabilities are identified, analyzed, and resolved in a timely manner
* The security awareness and training programs are effective and aligned with the security roles and responsibilities of the personnel
* The security audits and assessments are conducted by qualified and independent auditors
* The security audit and assessment results are documented and communicated to the appropriate parties
* The security audit and assessment findings and recommendations are addressed and implemented in a prioritized and systematic way Periodic audits are not only a means to meet regulations or adhere to a schedule, but also a way to validate that the security policies and procedures are performing as intended and achieving the desired security outcomes. Periodic audits also help to identify gaps and weaknesses in the security program and provide opportunities for improvement and enhancement. References: Periodic audits are an essential part of the ISA/IEC 62443 cybersecurity standards, as they help to verify the effectiveness and compliance of the security program. According to the ISA/IEC 62443-2-1 standard, periodic audits should be conducted to evaluate the following aspects1:
* The security policies and procedures are consistent with the security requirements and objectives of the organization
* The security policies and procedures are implemented and enforced in accordance with the security program
* The security policies and procedures are reviewed and updated regularly to reflect changes in the threat landscape, the IACS environment, and the business needs
* The security performance indicators and metrics are measured and reported to the relevant stakeholders
* The security incidents and vulnerabilities are identified, analyzed, and resolved in a timely manner
* The security awareness and training programs are effective and aligned with the security roles and responsibilities of the personnel
* The security audits and assessments are conducted by qualified and independent auditors
* The security audit and assessment results are documented and communicated to the appropriate parties
* The security audit and assessment findings and recommendations are addressed and implemented in a prioritized and systematic way Periodic audits are not only a means to meet regulations or adhere to a schedule, but also a way to validate that the security policies and procedures are performing as intended and achieving the desired security outcomes. Periodic audits also help to identify gaps and weaknesses in the security program and provide opportunities for improvement and enhancement. References:
NEW QUESTION # 59
Which of the following is a recommended default rule for IACS firewalls?
Available Choices (select all choices that are correct)
- A. Allow traffic directly from the IACS network to the enterprise network.
- B. Block all traffic by default.
- C. Allow all traffic by default.
- D. Allow IACS devices to access the Internet.
Answer: B
NEW QUESTION # 60
In a defense-in-depth strategy, what is the purpose of role-based access control?
Available Choices (select all choices that are correct)
- A. Ensures that users can access only certain devices on the network
- B. Ensures that users can access only the functions they need for their job
- C. Ensures that users correctly manage their username and password
- D. Ensures that users can access systems from remote locations
Answer: B
Explanation:
Role-based access control (RBAC) is a method of restricting access to resources based on the roles of individual users within an organization. RBAC assigns permissions and responsibilities to roles, rather than to individual users, and then assigns users to those roles. This way, users can only perform the actions that are relevant and necessary for their role, and not access or modify any other resources that are beyond their scope of authority. RBAC is one of the security countermeasures that can be implemented in a defense-in-depth strategy, which is a layered approach to protect industrial automation and control systems (IACS) from cyber threats. RBAC can help prevent unauthorized access, misuse, or sabotage of IACS resources, as well as reduce the risk of human error or insider attacks.
References:
* ISA/IEC 62443-3-3:2013, Security for industrial automation and control systems - Part 3-3: System security requirements and security levels, Clause 5.3.2.11
* ISA/IEC 62443-2-1:2010, Security for industrial automation and control systems - Part 2-1: Establishing an industrial automation and control systems security program, Clause 6.2.2.32
* ISA/IEC 62443-4-1:2018, Security for industrial automation and control systems - Part 4-1: Product security development life-cycle requirements, Clause 5.2.3.23
* ISA/IEC 62443-4-2:2019, Security for industrial automation and control systems - Part 4-2: Technical security requirements for IACS components, Clause 4.2.3.24
NEW QUESTION # 61
Which of the following is an industry sector-specific standard?
Available Choices (select all choices that are correct)
- A. NIST SP800-82
- B. API 1164
- C. D. ISO 27001
- D. ISA-62443 (EC 62443)
Answer: B
Explanation:
API 1164 is an industry sector-specific standard that provides guidance on the cybersecurity of pipeline supervisory control and data acquisition (SCADA) systems. API stands for American Petroleum Institute, which is the largest U.S. trade association for the oil and natural gas industry. API 1164 was first published in
2004 and revised in 2009 and 2021. The latest version of the standard aligns with the ISA/IEC 62443 series of standards and incorporates the concepts of security levels, zones, and conduits. API 1164 covers the security lifecycle of pipeline SCADA systems, from risk assessment and policy development to implementation and maintenance. The standard also defines roles and responsibilities, security requirements, security controls, and security assessment methods for pipeline SCADA systems.
References:
* API 1164: Pipeline SCADA Security, Fourth Edition, September 2021
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Study Guide, Section 2.2.2, Industry Sector-Specific Standards
* ISA/IEC 62443 Cybersecurity Fundamentals Specialist Exam Specification, Section 2.2.2, Industry Sector-Specific Standards
NEW QUESTION # 62
What impact do increasing cybercrime attacks have?
- A. They lead to improved cybersecurity measures.
- B. They affect suppliers of essential services.
- C. They primarily target personal devices.
- D. They focus solely on financial institutions.
Answer: B
Explanation:
Increasing cybercrime attacks have a significant impact on suppliers of essential services, including those in energy, water, transportation, and manufacturing. ISA/IEC 62443 and related critical infrastructure guidance highlight that attackers are increasingly targeting organizations whose disruption can have widespread societal consequences. While cybercrime can drive organizations to improve cybersecurity, the main documented impact is the risk to essential services and infrastructure.
Reference: ISA/IEC 62443-1-1:2007, Section 4.4; NIST CSF, Section 1.0.
NEW QUESTION # 63
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