ISA/IEC 62443 CYBERSECURITY FUNDAMENTALS
SPECIALIST EXAMINATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A|INSTANT DOWNLOAD PDF
1. What is the primary goal of ISA/IEC 62443?
A) Increase network traffic
B) Improve industrial cybersecurity
C) Replace firewalls
D) Manage software licenses
Rationale: ISA/IEC 62443 provides standards for securing
industrial automation and control systems.
2. ISA/IEC 62443 primarily applies to:
A) Office productivity software
B) Industrial automation and control systems
C) School networks
D) Personal computers
Rationale: It focuses on industrial environments, not consumer
systems.
3. Which entity certifies organizations under ISA/IEC 62443?
,A) FDA
B) Accredited certification bodies
C) WHO
D) FCC
Rationale: Certification bodies accredited by ISA or similar
organizations perform evaluations.
4. What is a core concept in ISA/IEC 62443?
A) Public sharing of credentials
B) Defense in depth
C) Remove logs
D) Unencrypted communication
Rationale: Defense in depth uses multiple layers of security.
5. Which section covers secure product development?
A) ISA-99.01
B) ISA/IEC 62443-4-1
C) ISA/IEC 62443-3-3
D) ISO 27001
Rationale: 62443-4-1 defines secure product development
lifecycle requirements.
6. What does “SIL” stand for in cybersecurity context?
,A) Secure Internal Layer
B) Security Level
C) Safety Integrated Logic
D) Secure IoT Link
Rationale: ISA/IEC uses Security Levels (SL) to describe
resistance to threats.
7. A higher Security Level means:
A) Easier access
B) Greater resistance to attacks
C) Fewer controls
D) Less documentation
Rationale: Higher SLs involve stronger protections.
8. What is the first step in risk assessment?
A) Purchase a firewall
B) Identify assets
C) Delete backups
D) Open ports
Rationale: You must know what you are protecting.
9. A ‘threat agent’ is:
, A) A computer virus
B) An entity capable of causing harm
C) A security policy
D) A firewall rule
Rationale: Threat agents exploit vulnerabilities.
10. What does “defense in depth” mean?
A) One strong control
B) Multiple layers of security controls
C) No controls
D) Only physical security
Rationale: Layered controls reduce risk.
11. ISA/IEC 62443 requires which method for authenticating
users?
A) Anonymous access
B) Strong authentication
C) Password reuse
D) No authentication
Rationale: Strong authentication prevents unauthorized access.
12. What is an ICS?
SPECIALIST EXAMINATION EXAM QUESTIONS AND
CORRECT ANSWERS (VERIFIED ANSWERS) PLUS
RATIONALES 2026 Q&A|INSTANT DOWNLOAD PDF
1. What is the primary goal of ISA/IEC 62443?
A) Increase network traffic
B) Improve industrial cybersecurity
C) Replace firewalls
D) Manage software licenses
Rationale: ISA/IEC 62443 provides standards for securing
industrial automation and control systems.
2. ISA/IEC 62443 primarily applies to:
A) Office productivity software
B) Industrial automation and control systems
C) School networks
D) Personal computers
Rationale: It focuses on industrial environments, not consumer
systems.
3. Which entity certifies organizations under ISA/IEC 62443?
,A) FDA
B) Accredited certification bodies
C) WHO
D) FCC
Rationale: Certification bodies accredited by ISA or similar
organizations perform evaluations.
4. What is a core concept in ISA/IEC 62443?
A) Public sharing of credentials
B) Defense in depth
C) Remove logs
D) Unencrypted communication
Rationale: Defense in depth uses multiple layers of security.
5. Which section covers secure product development?
A) ISA-99.01
B) ISA/IEC 62443-4-1
C) ISA/IEC 62443-3-3
D) ISO 27001
Rationale: 62443-4-1 defines secure product development
lifecycle requirements.
6. What does “SIL” stand for in cybersecurity context?
,A) Secure Internal Layer
B) Security Level
C) Safety Integrated Logic
D) Secure IoT Link
Rationale: ISA/IEC uses Security Levels (SL) to describe
resistance to threats.
7. A higher Security Level means:
A) Easier access
B) Greater resistance to attacks
C) Fewer controls
D) Less documentation
Rationale: Higher SLs involve stronger protections.
8. What is the first step in risk assessment?
A) Purchase a firewall
B) Identify assets
C) Delete backups
D) Open ports
Rationale: You must know what you are protecting.
9. A ‘threat agent’ is:
, A) A computer virus
B) An entity capable of causing harm
C) A security policy
D) A firewall rule
Rationale: Threat agents exploit vulnerabilities.
10. What does “defense in depth” mean?
A) One strong control
B) Multiple layers of security controls
C) No controls
D) Only physical security
Rationale: Layered controls reduce risk.
11. ISA/IEC 62443 requires which method for authenticating
users?
A) Anonymous access
B) Strong authentication
C) Password reuse
D) No authentication
Rationale: Strong authentication prevents unauthorized access.
12. What is an ICS?
