This unit introduces the principles behind the transport layer and discusses the services provided by that layer. Transport layer protocols, including TCP and UDP, are covered, as well as some important calculations and performance analysis techniques.
The unit examines the transport layer of the Internet protocol stack. The transport layer facilitates the transport of application-layer messages between the client and server sides of the application. It is responsible for the delivery of messages between devices that use the same transport-layer protocols. The unit also looks at how these services are implemented in transport layer protocols, including the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).