Understanding the OSI Model: The Backbone of Networking
Understanding the OSI Model: The Backbone of Networking If you are preparing for Bank or SSC exams, the OSI (Open Systems Interconnection) model is a "must-know" topic. It describes how data moves from one computer to another over a network. What is the OSI Model? Developed by the ISO in 1984, it is a conceptual framework that breaks down network communication into 7 distinct layers . The 7 Layers (Top to Bottom) Layer Number Layer Name Data Unit Primary Function Layer 7 Application Data User interface (HTTP, FTP, SMTP) Layer 6 Presentation Data Data Encryption, Compression, Translation Layer 5 Sessi...