Computer Hacking Forensic Investigator (CHFI v10) — Question 573

What layer of the OSI model do TCP and UDP utilize?

Answer options

• A. Data Link
• B. Network
• C. Transport
• D. Session

Correct answer: C

Explanation

The correct answer is C, Transport, because both TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate at this layer, responsible for end-to-end communication and data flow control. Options A, B, and D are incorrect as they refer to other layers in the OSI model that do not handle TCP and UDP protocols.