Transport Layer Protocols in Computer Network

Introduction:

The OSI model consists of seven protocol layers and each layer performs a supportive communication task.
The Transport layer is the fourth layer in the OSI model, which provides communication services between the computers connected in the network.
For example: The transport layer provides an error checking service during the transmission of  data packets from source computer to destination computer.

Process-to-Process Delivery

• The data link layer helps to deliver the frames between two neighboring nodes over a link. This process is called as node-to-node delivery.
• The network layer helps to deliver the datagrams between two hosts. This process is called as host-to-host delivery.
• Several processes are carried out on the source host and destination host. Some mechanism is needed to complete the delivery process between the source host and destination host.
• The transport layer helps to carry out the  process-to-process delivery i.e. the delivery of a packet or part of message from one process to another process.