CRISC Information Technology and Security Practice Question
An organization is implementing IEC 62443 for its industrial control systems. Which THREE of the following are key requirements of IEC 62443? (Select three.)
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Applying security levels (SL) to each zone based on risk
IEC 62443 is a comprehensive standard covering security management, system design, and component requirements. It requires risk assessment, defense-in-depth (zones and conduits), and secure development lifecycle.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Applying security levels (SL) to each zone based on risk
Why this is correct
Security levels define the required robustness of controls per zone.
- ✓
Ensuring all industrial components have a secure development lifecycle (SDL)
Why this is correct
IEC 62443-4-1 requires secure development processes for components.
- ✗
Using proprietary protocols to enhance performance
Why it's wrong here
Proprietary protocols are discouraged due to security concerns.
- ✓
Conducting a risk assessment to identify security zones and conduits
Why this is correct
Risk assessment is foundational to define zones and conduits for segmentation.
- ✗
Implementing a single-vendor solution to reduce complexity
Why it's wrong here
IEC 62443 does not mandate single-vendor solutions.
Go deeper
Related to this question
About these practice questions
Courseiva writes every CRISC question from scratch — 983 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CRISC practice question is part of Courseiva's free ISACA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CRISC exam.