ISA/IEC 62443 Cybersecurity Fundamentals Specialist : ISA-IEC-62443

ISA-IEC-62443 real exams

Exam Code: ISA-IEC-62443

Exam Name: ISA/IEC 62443 Cybersecurity Fundamentals Specialist

Updated: Jun 03, 2026

Q & A: 221 Questions and Answers

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ISA/IEC 62443 Cybersecurity Fundamentals Specialist Sample Questions:

1. Why is OPC Classic considered firewall unfriendly?

A) It works with control devices from different manufacturers.
B) It allows use of only port 80.
C) It dynamically assigns several ports.
D) It is an obsolete communication standard.


2. In terms of availability requirements, how do IACS and IT differ?

A) Continuous operation is expected in IT while scheduled operation is sufficient for IACS.
B) Both IACS and IT have the same availability requirements.
C) Rebooting is never acceptable in IT but tolerated in IACS.
D) IACS tolerates occasional failures while IT does not.


3. What is a key aspect of the relationship between physical security measures and cybersecurity?

A) They should operate independently.
B) They should complement each other.
C) Physical security is more important.
D) Cybersecurity is irrelevant.


4. What is the name of the missing layer in the Open Systems Interconnection (OSI) model shown below?

A) Protocol
B) Control
C) Transport
D) User


5. If a U.S. federal agency must comply with mandatory cybersecurity requirements under law, which document would they be required to follow?

A) EU Cyber Resilience Act
B) ISA/IEC 62443
C) NIST FIPS
D) NIST Special Publication 800-171


Solutions:

Question # 1
Answer: C
Question # 2
Answer: A
Question # 3
Answer: B
Question # 4
Answer: C
Question # 5
Answer: C

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