In a standard networking protocol stack, the transport layer provides reliable transfer, fragmentation and de-fragmentation (when necessary), error detection and (within limits) recovery. Being located between the network layer (3) and the session layer (5) within the OSI network model, the transport layer uses services of both adjacent layers to facilitate uplink and downlink of the respective protocol data units.
Many networking protocols do not strictly follow the OSI networking model, and may thus employ a different interpretation of transport layer.
transport layer
transport layer
TCP and UDP are transport layer protocols; the OSI layer is layer 4 (transport)
Application layer, and Transport layer.
transport layer
transport layer
Port Number
TCP operates at transport layer
Tcp/ip
transport protocol control the transportation of data and choose the best way for transmit ion.
Layer 4 (Transport) is responsible for correction.
The Transport Layer