June 19, 2022

The transport layer entity interacts with both a user in the application layer and an entity in the network layer. According to the reference model, these interactions will be performed using DATA.req and DATA.ind primitives. However, to simplify the presentation and to avoid confusion between a DATA.req primitive issued by the user of the transport

As the transport layer is built on top of the network layer, it is important to know the key features of the network layer service. There are two types of network layer services : connectionless and connection oriented. The connectionless network layer service is the most widespread. Its main characteristics are : the connectionless network