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Most of us use a browser every single day. We type something in the address bar, hit Enter, and boom — a website appears. But that explanation is way too shallow. A browser is not just a “website opener.” It’s a full-blown software system that: Fetc...
What is DNS? 1️⃣ DNS is the Internet’s Phonebook DNS translates: google.com → 142.x.x.x Humans remember names.Machines route using IP addresses. But DNS is not a single phonebook. It’s a hierarchical, delegated, distributed system. 2️⃣ The Big Pi...
TCP Handshake and Reliable Communication (Explained Simply) When I first started learning networking, one question kept coming up in my head: What actually happens before two computers start talking? Because if you think about it, sending data with...