TCP is the protocol of which layer of the OSI model?

The correct answer is A. Transport. TCP stands for Transmission Control Protocol, and it is one of the main protocols used in the internet. TCP provides reliable, ordered, and error-free delivery of data between applications. In terms of the OSI model, TCP is a transport-layer protocol. The transport layer is the f

Submitted by andreas_gr· Apr 18, 2026Cybersecurity Foundations

Question

Options

ATransport
BSession
CData Link
DApplication

How the community answered

(20 responses)

A
90% (18)
B
5% (1)
D
5% (1)

Explanation

TCP stands for Transmission Control Protocol, and it is one of the main protocols used in the internet. TCP provides reliable, ordered, and error-free delivery of data between applications. In terms of the OSI model, TCP is a transport-layer protocol. The transport layer is the fourth layer of the OSI model, and it is responsible for establishing end-to-end connections, segmenting data into packets, and ensuring reliable and efficient data transfer. The transport layer also provides flow control, congestion control, and error detection and correction mechanisms. TCP is not the only transport-layer protocol; another common one is UDP (User Datagram Protocol), which is faster but less reliable than TCP.

Topics

#OSI Model#TCP#Networking Protocols#Transport Layer

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