ISA/IEC 62443 Cybersecurity Fundamentals Specialist — Question 71

What is a commonly used protocol for managing secure data transmission over a Virtual Private Network (VPN)?

Answer options

• A. HTTPS
• B. IPSec
• C. MPLS
• D. SSH

Correct answer: B

Explanation

IPSec is the correct answer as it is specifically designed to secure Internet Protocol (IP) communications by authenticating and encrypting each IP packet in a communication session. HTTPS is used for secure web browsing, MPLS is a protocol for efficient data forwarding, and SSH is used for secure remote administration, but they are not primarily focused on securing VPN data transmission.