CompTIA Network+ (N10-007) — Question 611

Which of the following OSI layers do TCP and UDP operate within?

Answer options

• A. Data link
• B. Network
• C. Session
• D. Transport
• E. Presentation
• F. Application

Correct answer: D

Explanation

The correct answer is D, as both TCP and UDP are protocols that operate at the Transport layer of the OSI model, responsible for end-to-end communication. The other options represent different layers where TCP and UDP do not function, such as Data link, Network, Session, Presentation, and Application layers.