CompTIA CySA+ (CS0-002) — Question 200

Which of the following ICS network protocols has no inherent security functions on TCP port 502?

Answer options

• A. CIP
• B. DHCP
• C. SSH
• D. Modbus

Correct answer: D

Explanation

The correct answer is D, Modbus, as it is known for having no intrinsic security mechanisms. In contrast, CIP, DHCP, and SSH each include some level of security features or protocols designed to enhance security.