The OSI Model Explained: Why It Still Matters in 2026
What the OSI Model Is (and Isn’t) The OSI model breaks communication systems into seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. From the physical cables and signals (Layer 1) to the apps we actually interact with (Layer 7), each layer handles a specific piece of the data puzzle. Data gets packaged, […]









