ISA IC33 ISA-IEC 62443 Cybersecurity Risk Assessment Specialist Exam Prep
IC33 ISA-IEC 62443 Cybersecurity Risk Assessment Specialist (Page 4 )

Updated On: 13-Sep-2026

What is the correct order of the IACS Cybersecurity Lifecycle?

  1. Assess phase, develop and implement phase, maintain phase
  2. Assess phase, maintain phase, develop and implement phase
  3. Develop and implement phase, assess phase, maintain phase
  4. Maintain phase, develop and implement phase, assess phase

Answer(s): A

Explanation:

The IACS cybersecurity lifecycle begins with the Assess phase, where the system, risks, vulnerabilities, zones, conduits, and cybersecurity requirements are identified. Then comes the Develop and Implement phase, where countermeasures and security requirements are implemented. Finally, the Maintain phase ensures cybersecurity is monitored, reviewed, updated, and sustained over time.



How has the system architecture diagram model evolution impacted the risks associated with the system under consideration?

  1. It simplified the architecture.
  2. It reduced the number of components.
  3. It eliminated the need for assessments.
  4. It changed to a network model.

Answer(s): D

Explanation:

Traditional system architecture models have evolved toward more interconnected network-based models. This increases cybersecurity exposure because the SUC now includes more communication paths, interfaces, and possible threat vectors that must be assessed.



What attribute is NOT required for documenting hardware devices?

  1. Device type
  2. Serial number
  3. Appearance
  4. Manufacturer

Answer(s): C

Explanation:

A hardware asset inventory normally documents technical identification details such as device type, manufacturer, model information, serial number, firmware/version, location, and network information. Appearance is not a required inventory attribute.



What is the intent of having a system architecture diagram when preparing the security assessment of an industrial control system?

  1. To detail the asset inventory of the system components
  2. To define the network layout of the primary system components
  3. To illustrate the location and interconnectivity of the primary components of a system
  4. To illustrate the functional behavior of the system

Answer(s): C

Explanation:

A system architecture diagram helps assessors understand the main system components, where they are located, and how they are interconnected. This supports scope definition, asset identification, and later zone/ conduit analysis.



What should be included in the IACS architecture drawings to assist in identifying equipment on site?

  1. Equipment model numbers
  2. Pictures of hardware components
  3. Network names
  4. Historical equipment data

Answer(s): A

Explanation:

Including equipment model numbers in IACS architecture drawings helps assessors and site personnel accurately identify physical equipment, verify assets, and connect the drawing information to the asset inventory during assessment preparation.



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