From real-time chat apps and multiplayer games to dashboards and IoT devices—sockets are the invisible threads holding it all together. In this deep dive, we unravel how sockets work under the hood, how they're different from connections and requests, and how high-performance servers handle millions of them using event-based models like epoll and kqueue. We even build a working socket-based chat app in Python to show it all in action. Whether you're a backend dev, systems engineer, or just socket-curious—this video will change how you see the internet. Want more? We also demystify how WebSockets differ from raw TCP sockets and why browsers need special handling. Stick around and level up your network programming game! Web Sockets Basics: Web Sockets Deep Dive: 🕒 Timestamps 00:00 – Why Sockets Matter (Real-World Examples) 01:47 – What Is a Socket (Explained Like You’re Five) 02:00 – Socket vs Connection vs Request 02:16 – Stream vs Datagram Sockets (TCP vs UDP) 03:22 – Under the Hood: What Happens in Code (Python Example) 05:48 – Build a Simple Chat App Using Python Sockets 07:02 – How Sockets Work Across Operating Systems 08:40 – Scaling with epoll and kqueue (Handling 100K+ Sockets) 10:48 – WebSockets vs Raw Sockets (What’s the Difference?) 12:00 – Closing Thoughts & Real-World Applications AWS Certification: AWS Certified Cloud Practioner: AWS Certified Solution Architect Associate: AWS Certified Solution Architect Professional: #Sockets #WebSockets #SystemDesign #NetworkProgramming #BackendEngineering #PythonSockets