ISA/IEC 62443 Cybersecurity Fundamentals Specialist — Question 1

Which of the following can be employed as a barrier device in a segmented network?

Answer options

• A. Router
• B. Unmanaged switch
• C. VPN
• D. Domain controller

Correct answer: A

Explanation

A Router is designed to manage traffic between different segments of a network, effectively acting as a barrier. An unmanaged switch does not control traffic between segments and cannot provide such a barrier. A VPN secures data in transit but does not segment networks, while a Domain controller primarily manages user access and authentication, not network segmentation.