Data communication and OSI layer Model

🧱 Layered Tasks in Data Communication Network Data communication is a complex process, so it's divided into layers to make it easier to design, implement, and troubleshoot. This concept is the foundation of the OSI Model and TCP/IP Model. 🎯 Why Layering? To break a complex communication task into smaller, manageable parts Each layer performs specific functions Layers work independently but communicate with each other 📚 Main Layered Tasks: Here are the common tasks that are divided across different layers: 1️⃣ Physical Layer Tasks Transmission of raw bits (0s and 1s) over a physical medium Define cables, voltages, connectors 2️⃣ Data Link Layer Tasks Framing of data Error detection and correction Flow control and MAC addressing 3️⃣ Network Layer Tasks Routing of packets Logical addressing (IP Addressing) Decide path for data transfer 4️⃣ Transport Layer Tasks Ensures end-to-end communication Segmentation and reassembly of data Error recovery and flow control 5️⃣ Session Layer Tas...