CompTIA Network+ (N10-008) — Question 783

Which of the following OSI layers is ICMP a part of?

Answer options

• A. Application
• B. Session
• C. Network
• D. Transport

Correct answer: C

Explanation

ICMP is part of the Network layer of the OSI model, responsible for network diagnostics and error reporting. The Application layer deals with end-user applications, the Session layer manages sessions between applications, and the Transport layer is responsible for end-to-end communication, none of which pertain to ICMP.