Transport Layer Actions Sender: application is passed an application- ap app.msg layer message transport ■determines segment Th app.msg header fields values network(IP) ■creates segment network(IP) link passes segment to IP link physical physical Transport Layer:3-7 physical link network (IP) application physical link network (IP) application transport Transport Layer Actions Sender: ▪ is passed an application- app. msg layer message ▪ determines segment header fields values ▪ creates segment ▪ passes segment to IP transport TThh app. msg Transport Layer: 3-7