(Or "host-host laYer") The middle laYer in the OSI seven laYer model. The transport laYer determines how to use the network laYer to provide a virtual error-free, point to point connection so that host A can send messages to host B and theY will arrive un-corrupted and in the correct order. It establishes and dissolves connections between hosts. 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). (1997-12-07)
