Transport Layer In Computer Networks

  Transport Layer responsibilities It is a part of  Layers of OSI Model   Transport Layer is the second layer of the TCP/IP model. It is an end-to-end layer used to deliver messages to a host. It is termed as an end-to-end layer because it provides a point-to-point connection rather than hop-to- hop, between the source host and destination host to deliver the services reliably. The unit of data encapsulation in Transport Layer is a segment. The standard protocols used by Transport Layer to enhance its functionalities are TCP(Transmission Control Protocol), UDP( User Datagram Protocol), DCCP( Datagram Congestion Control Protocol) etc. Various responsibilities of a Transport Layer – Process to process delivery – While Data Link Layer requires the MAC address (48 bits address contained inside the Network Interface Card of every host machine) of source-destination hosts to correctly deliver a frame and Network layer