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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q127-Q132):

NEW QUESTION # 127
Why is it important to document the results of the initial/high-level risk assessment?

A. To reduce communication
B. To establish a baseline
C. To skip future assessments
D. To avoid stakeholder involvement

Answer: B

Explanation:
Documenting the results of the initial or high-level risk assessment is crucial to establish a baseline for cybersecurity posture and risk. This baseline serves as a reference for tracking progress, justifying future investments, measuring improvements, and supporting subsequent detailed risk assessments. It also aids in communication with stakeholders and auditors.
Reference: ISA/IEC 62443-2-1:2009, Section 5.2.3 ("Documenting results and baseline"); ISA/IEC 62443-3-
2:2020, Section 4.3.4.

NEW QUESTION # 128
Which is one of the PRIMARY goals of providing a framework addressing secure product development life-cycle requirements?
Available Choices (select all choices that are correct)

A. Aligned development process
B. Well-documented security policies and procedures
C. Aligned needs of industrial users
D. Defense-in-depth approach to designing

Answer: B

Explanation:
One of the primary goals of providing a framework that addresses secure product development lifecycle requirements is to ensure that security policies and procedures are well-documented. This objective is crucial because it establishes a structured and standardized approach to security that is integrated throughout the development process of software or systems. This framework helps in aligning the development process with security best practices, thereby mitigating risks associated with security vulnerabilities. Documentation of security policies and procedures ensures that security considerations are consistently applied and that compliance with relevant standards, such as ISA/IEC 62443, is maintained. This foundational approach supports the overall security posture by embedding security considerations directly into the lifecycle of product development, rather than addressing security as an afterthought.

NEW QUESTION # 129
Which of the following is an example of separation of duties as a part of system development and maintenance?
Available Choices (select all choices that are correct)

A. Changes are approved by one party and implemented by another.
B. Configuration settings are made by one party and self-reviewed using a checklist.
C. Developers write and then test their own code.
D. Design and implementation are performed by the same team.

Answer: A

Explanation:
Separation of duties is a security principle that aims to prevent fraud, errors, conflicts of interest, or misuse of resources by dividing critical tasks or functions among different people or teams. It is one of the foundational requirements (FRs) of the ISA/IEC 62443 standards for securing industrial automation and control systems (IACSs). According to the ISA/IEC 62443-2-1 standard, separation of duties includes the following system requirements (SRs):
* SR 2.1: Security management policy
* SR 2.2: Personnel security
* SR 2.3: System development and maintenance
* SR 2.4: Incident response and recovery
* SR 2.5: Compliance and review
Among these SRs, the one that is most related to the example of system development and maintenance is SR
2.3. SR 2.3 requires that the IACS shall provide the capability to ensure that the development and maintenance of the system and its components are performed in a secure manner. This means that the IACS should have a mechanism to control the access and authorization of developers, testers, integrators, and maintainers who work on the system and its components. It also means that the IACS should have a mechanism to verify and validate the quality and security of the system and its components before, during, and after the development and maintenance processes.
Therefore, an example of separation of duties as a part of system development and maintenance is that changes are approved by one party and implemented by another. This ensures that the changes are authorized, documented, and reviewed by someone who is not involved in the implementation. This reduces the risk of introducing errors, vulnerabilities, or malicious code into the system and its components.
References:
ISA/IEC 62443-2-1:2010, Security for industrial automation and control systems - Part 2-1: Establishing an industrial automation and control systems security program1 ISA/IEC 62443 Cybersecurity Fundamentals Specialist Certificate Program2 ISA/IEC 62443 Cybersecurity Library3 Using the ISA/IEC 62443 Standards to Secure Your Control Systems4

NEW QUESTION # 130
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. References https://www.cisco.com/c/en/us/td/docs/solutions
/Verticals/IoT_Security_Lab/IEC62443_WP.pdf
https://www.cisco.com/c/en/us/td/docs/solutions/Verticals/IoT_Security_Lab/IEC62443_WP.pdf

NEW QUESTION # 131
Which is a role of the application layer?
Available Choices (select all choices that are correct)

A. Provides the mechanism for opening, closing, and managing a session between end-user application
processes
B. Includes protocols specific to network applications such as email, file transfer, and reading data registers
in a PLC
C. Delivers and formats information, possibly with encryption and security
D. Includes user applications specific to network applications such as email, file transfer, and reading data
registers in a PLC

Answer: D

NEW QUESTION # 132
......

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