OSI Model Explained in a Nutshell (All 7 Layers Made Simple) by Netlabs Hub

The OSI model (Open Systems Interconnection) is a conceptual framework that explains how data travels across a network by dividing communication into seven logical layers. Starting from the Physical layer, which handles the transmission of raw bits over cables or wireless signals, data moves up through the Data Link and Network layers that manage addressing and routing, then to the Transport layer that ensures reliable delivery using protocols like TCP. The upper layers—Session, Presentation, and Application—focus on managing communication sessions, formatting and encrypting data, and providing network services to end-user applications such as web browsers and email. By separating networking tasks into layers, the OSI model makes it easier to design, troubleshoot, and understand how different technologies and protocols work together in modern computer networks. #netlabshub #CiscoNetworks