ISA/IEC 62443 Cybersecurity Fundamentals Specialist — Question 79

Which of the following starts at a high level and includes all ANSI/ISA-95 Level 0, 1, 2, 3, 4 equipment and information systems?

Answer options

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

Correct answer: D

Explanation

The correct answer is D, Reference architecture, as it provides a high-level overview and includes all specified levels of equipment and systems. The other options, while related, do not encompass the full range of ANSI/ISA-95 levels as comprehensively as a reference architecture does.