ISA/IEC 62443 Cybersecurity Fundamentals Specialist — Question 9

Which service does an Intrusion Detection System (IDS) provide?

Answer options

• A. It is the lock on the door for networks and computer systems.
• B. It is effective against all vulnerabilities in networks and computer systems.
• C. It blocks malicious activity in networks and computer systems.
• D. It detects attempts to break into or misuse a computer system.

Correct answer: D

Explanation

The correct answer is D because an Intrusion Detection System (IDS) is specifically designed to monitor and identify unauthorized access attempts or misuse of computer systems. Options A, B, and C describe other security functions but do not accurately represent the primary role of an IDS, which is detection rather than prevention or acting as a physical barrier.