ISA/IEC 62443 Cybersecurity Fundamentals Specialist — Question 83

Which layer deals with data format conversion and encryption?

Answer options

• A. Session
• B. Data link
• C. Application
• D. Presentation

Correct answer: D

Explanation

The correct answer is D, as the Presentation layer is specifically designed to handle data formatting and encryption. The Session layer (A) manages sessions between applications, the Data link layer (B) is focused on node-to-node data transfer, and the Application layer (C) provides network services to end-user applications, but does not perform data format conversion or encryption.