ISA/IEC 62443 Cybersecurity Fundamentals Specialist — Question 27

Which statement is TRUE regarding Intrusion Detection Systems (IDS)?

Answer options

• A. Modern IDS recognize IACS devices by default.
• B. They are very inexpensive to design and deploy.
• C. They are effective against known vulnerabilities.
• D. They require a small amount of care and feeding

Correct answer: C

Explanation

Option C is correct because Intrusion Detection Systems are designed to detect and respond to known vulnerabilities effectively. Option A is incorrect as not all modern IDS can recognize IACS devices by default. Option B is misleading because while some may be inexpensive, designing and deploying an effective IDS can involve significant costs. Option D is also wrong since IDS usually require ongoing management and updates to remain effective.