What Actually Happens When You Type google.com — And All the Terms Behind It

This one goes deep. Understanding what happens in those few milliseconds between hitting Enter and seeing a webpage is one of those things that makes you look at the internet completely differently. Let's walk through it properly. The Journey of a Single Request Step 1 — You type google.com and hit Enter Simple enough. But what happens next is anything but. Step 2 — DNS Lookup: Finding the Address Your browser doesn't understand names — it understands IP addresses. So first it needs to translate google.com into something like 142.250.195.46. It checks in this order: Local cache → ISP → Root server → gets the Mumbai IP (or wherever you're closest to) Think of DNS as the internet's phonebook. You give it a name, it gives you a number. Step 3 — TCP Handshake: Building the Road Before any data moves, a reliable connection needs to be established. This is the TCP handshake — using SYN and ACK messages back and forth to essentially say "hey, can you hear me?" — "yes, can you hear me?" — "yes