Interacting with Protocol Software Client or server uses transport protocols Protocol software inside os Applications outside os Mechanism needed to bridge the two Called Application Program Interface (API) 哈工大计算机学院李全龙 Network Application Development Socket Programming 3哈工大计算机学院 李全龙 Network Application Development Socket Programming 3 Interacting with Protocol Software „ Client or server uses transport protocols „ Protocol software inside OS „ Applications outside OS „ Mechanism needed to bridge the two „ Called Application Program Interface (API)