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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q65-Q70):

NEW QUESTION # 65
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 confirm audit procedures
C. To adhere to a published or approved schedule
D. To meet regulations

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 # 66
Which organization manages the ISASecure conformance certification program?
Available Choices (select all choices that are correct)

A. Security Compliance Institute
B. American Society for Industrial Security
C. Automation Federation
D. National Institute of Standards and Technology

Answer: A

NEW QUESTION # 67
Which of the following provides the overall conceptual basis in the design of an appropriate security program?
Available Choices (select all choices that are correct)

A. Zone model
B. Reference model
C. Asset model
D. Reference architecture

Answer: B

Explanation:
The reference model provides the overall conceptual basis in the design of an appropriate security program. It defines the common terminology, concepts, and models that can be used by all stakeholders responsible for IACS security. The reference model describes the general characteristics of IACS, the typical threats and vulnerabilities, the security lifecycle phases, and the security levels. The reference model also introduces the concepts of zones and conduits, which are used to group and isolate assets with similar security requirements and to control the communication between them. Referenceshttps://www.cisco.com/c/en/us/td/docs/solutions/Verticals/IoT_Security_Lab/IEC62443_WP.pd
https://www.cisco.com/c/en/us/td/docs/solutions/Verticals/IoT_Security_Lab/IEC62443_WP.pdf

NEW QUESTION # 68
Which is the BEST practice when establishing security zones?
Available Choices (select all choices that are correct)

A. Security zones should align with physical network segments.
B. All components in a large or complex system should be in the same security zone.
C. Security zones should contain assets that share common security requirements.
D. Assets within the same logical communication network should be in the same security zone.

Answer: C

Explanation:
Security zones are logical groupings of assets that share common security requirements based on factors such as criticality, consequence, vulnerability, and threat. Security zones are used to apply the principle of defense in depth, which means creating multiple layers of protection to prevent or mitigate cyberattacks. By creating security zones, asset owners can isolate the most critical or sensitive assets from the less critical or sensitive ones, and apply different levels of security controls to each zone according to the risk assessment. Security zones are not necessarily aligned with physical network segments, as assets within the same network may have different security requirements. For example, a network segment may contain both a safety instrumented system (SIS) and a human-machine interface (HMI), but the SIS has a higher security requirement than the HMI. Therefore, the SIS and the HMI should be in different security zones, even if they are in the same network segment. Similarly, assets within the same logical communication network may not have the same security requirements, and therefore should not be in the same security zone. For example, a logical communication network may span across multiple physical locations, such as a plant and a corporate office, but the assets in the plant may have higher security requirements than the assets in the office. Therefore, the assets in the plant and the office should be in different security zones, even if they are in the same logical communication network. Finally, all components in a large or complex system should not be in the same security zone, as this would create a single point of failure and expose the entire system to potential cyberattacks. Instead, the components should be divided into smaller and simpler security zones, based on their security requirements, and the communication between the zones should be controlled by conduits.
Conduits are logical or physical connections between security zones that allow data flow and access control.
Conduits should be designed to minimize the attack surface and the potential impact of cyberattacks, by applying security controls such as firewalls, encryption, authentication, and authorization. References:
* How to Define Zones and Conduits1
* Securing industrial networks: What is ISA/IEC 62443?2
* ISA/IEC 62443 Series of Standards3

NEW QUESTION # 69
Which is a reason for
and physical security regulations meeting a mixed resistance?
Available Choices (select all choices that are correct)

A. Regulations contain only informative elements.
B. Cybersecurity risks can best be managed individually and in isolation.
C. There are a limited number of enforced cybersecurity and physical security regulations.
D. Regulations are voluntary documents.

Answer: C

Explanation:
Cybersecurity and physical security regulations are intended to provide guidance and requirements for protecting industrial control systems from various threats and risks. However, these regulations may face mixed resistance from different stakeholders for various reasons. One of the reasons is that there are a limited number of enforced cybersecurity and physical security regulations, especially at the international level. This means that some regions or countries may have more stringent or comprehensiveregulations than others, creating inconsistencies and challenges for cross-border cooperation and compliance. Moreover, some regulations may be outdated or not aligned with the current best practices and standards, such as ISA/IEC
62443, which may limit their effectiveness and applicability. Therefore, some organizations may prefer to follow voluntary standards or frameworks, such as ISA/IEC 62443, rather than mandatory regulations, as they may offer more flexibility and adaptability to the specific needs and contexts of each industrial control system. References:
* ISA/IEC 62443 Standards to Secure Your Industrial Control System, page 3
* Using the ISA/IEC 62443 Standard to Secure Your Control System, page 9

NEW QUESTION # 70
......

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