Layer 4 (transport layer) of the OSI Model

Layer 4 of the OSI model, also known as the transport layer, manages network traffic between hosts and end systems to ensure complete data transfers. Transport-layer protocols such as TCP, UDP, DCCP, and SCTP are used to control the volume of data, where it is sent, and at what rate.

Reference

• https://www.a10networks.com/glossary/what-is-layer-4-of-the-osi-model/