(Or "hoSt-hoSt layer") The middle layer in the OSISeven 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)