The Transport Layer of the Internet

By: Aidan and Erick

What is the Transport Layer (OSI)

The transport layer is the fourth layer in the open systems interconnection (OSI) network model.

The transport layer's tasks include error correction as well as segmenting and desegmenting data before and after it's transported across the network. This layer is also responsible for flow control and making sure that segmented data is delivered over the network in the correct sequence

This layer works transparently within the layers above to deliver and receive data without errors.

The transport layer's tasks include error correction as well as segmenting and desegmenting data before and after it's transported across the network. This layer is also responsible for flow control and making sure that segmented data is delivered over the network in the correct sequence.

This layer works transparently within the layers above to deliver and receive data without errors.

It breaks application messages into segments (packets) and passes them on to the network layer

The receiving side then reassembles segments into messages and passes them to the application layer







How does this layer relate to the TCP/IP model?


TCP (Transmission Control Protocol) manages how a message is broken down to be transmitted. IP (Internet Protocol) defines how to address and route packets to be delivered

The TCP/IP model is the condensed version of the OSI model and only has 4 layers. The transport layer in the TCP model allows the information to be delivered in an information chart format from the source to the destination host without defects.

Transport layer takes data from upper layer (Application layer) and then breaks it into smaller size segments, numbers each byte, and hands over to lower layer (Network Layer) for delivery.


























Sources

Techopedia Inc. (2021, October 20). What is the transport layer? - definition from Techopedia. Techopedia.com. Retrieved October 13, 2022, from https://www.techopedia.com/definition/9760/transport-layer#:~:text=The%20transport%20layer%20provides%20communication,the%20network%20(Layer%203)
Tawde, Swati. “OSI Model VS TCP/IP Model: Top 7 Useful Differences to Learn.” EDUCBA, 16 July 2022, from "//www.educba.com/osi-model-vs-tcp-ip-model/. https://www.educba.com/osi-model-vs-tcp-ip-model/.
“Transport Layer Introduction.” Tutorials Point, https://www.tutorialspoint.com/data_communication_computer_network/transport_layer_introduction.htm.