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

The correct answer is C. Transport. TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate at Layer 4 - the Transport layer - of the OSI model. This layer is responsible for end-to-end communication, segmentation, flow control, and error recovery between hosts. TCP provides reliable…

Submitted by fernanda_arg· Apr 18, 2026Network Forensics

Question

Options

AData Link
BNetwork
CTransport
DSession

How the community answered

(24 responses)

A
4% (1)
B
4% (1)
C
92% (22)

Explanation

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) operate at Layer 4 - the Transport layer - of the OSI model. This layer is responsible for end-to-end communication, segmentation, flow control, and error recovery between hosts. TCP provides reliable, connection-oriented communication, while UDP provides faster, connectionless communication. Layer 2 (Data Link) handles node-to-node delivery using MAC addresses. Layer 3 (Network) handles logical addressing and routing using IP. Layer 5 (Session) manages sessions between applications.

Topics

#OSI Model#TCP/UDP#Networking Protocols#Transport Layer

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