transport layer


transport layer

(networking)(Or "host-host layer") The middle layer in theOSI seven layer model. The transport layer determines howto use the network layer to provide a virtual error-free,point to point connection so that host A can send messages tohost B and they will arrive un-corrupted and in the correctorder. It establishes and dissolves connections betweenhosts. It is used by the session layer.

An example transport layer protocol is Transmission Control Protocol (TCP).

OSI documents: ITU Rec. X.214 (ISO 8072), ITU Rec. X.224(ISO 8073).

transport layer

The services in the OSI protocol stack (layer 4 of 7) that provide end-to-end management of the communications session. See transport protocol and OSI model.