Layered Architectures

General objective of this lecture is to explain Layered Architectures. Here briefly describe schemes for Organizing the Responsibility of Networking Components and provide a layered abstraction for networking. This also focus on Network Service Model and OSI Reference Model. A layered service model developed by the International Standardization Organization (ISO). Finally explain seven layers, they are (highest to lowest level): Application, Presentation, Session, Transport, Network, Data link and Physical.