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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions (Q208-Q213):

NEW QUESTION # 208
Which part of the ISA/IEC 62443 series describes a methodology to develop quantitative metrics?

Answer: C

Explanation:
ISA/IEC 62443-1-3 specifically provides guidance on developing quantitative metrics for evaluating the effectiveness of IACS security programs. This part introduces models and methods to create meaningful security program ratings, allowing organizations to quantitatively measure their security maturity and the effectiveness of security controls over time.
Reference: ISA/IEC 62443-1-3:2017, Introduction and Scope.


NEW QUESTION # 209
How can Modbus be secured?

Answer: C

Explanation:
Modbus, in its traditional form, lacks inherent security features. According to ISA/IEC 62443, one of the most practical ways to secure Modbus traffic is by placing it behind a firewall, which restricts access to only trusted sources and destinations. While VPNs and user access controls can add security, firewalls provide critical segmentation, which is explicitly recommended for legacy and insecure protocols like Modbus.
Reference: ISA/IEC 62443-3-3:2013, Section 4.2.3.4 ("Use of firewalls for insecure protocols"); ISA/IEC
62443-1-1:2007, Section 3.2.1.


NEW QUESTION # 210
How does ISA-62443-2-1 suggest integrating the IACS Security Program (SP) within an organization?

Answer: B

Explanation:
ISA/IEC 62443-2-1 explicitly requires that the IACS Security Program be integrated into the organization's overall management structure.
Step 1: Integration principle
The standard states that IACS security must align with business processes, governance, and enterprise security management rather than operate in isolation.
Step 2: Alignment with ISMS
Where an Information Security Management System (ISMS) exists, the IACS SP should be embedded within it to ensure consistent risk management, policy enforcement, and continuous improvement.
Step 3: Why other options are incorrect
Standalone security programs create silos. Full outsourcing violates asset owner accountability. Purely technical approaches ignore human and process factors.
Step 4: Operational outcome
Embedding the SP ensures sustainability, consistency, and executive oversight.
Therefore, the correct answer is by embedding it into organizational processes and the ISMS.


NEW QUESTION # 211
How can defense in depth be achieved via security zones?

Answer: D

Explanation:
ISA/IEC 62443 defines "defense in depth" as a layered approach to security. This can be accomplished by implementing zones within zones (sometimes called subzones), where each zone or subzone provides an additional security barrier or control layer. This segmentation restricts an attacker's ability to move laterally and ensures that compromise of one zone does not automatically result in compromise of the entire system.
Reference: ISA/IEC 62443-1-1:2007, Section 4.3.3 ("Zones and Conduits"); ISA/IEC 62443-3-2:2020, Section 4.4.3 ("Layered security using zones and subzones").


NEW QUESTION # 212
After receiving an approved patch from the JACS vendor, what is BEST practice for the asset owner to
follow?
vailable Choices (select all choices that are correct)

Answer: D


NEW QUESTION # 213
......

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