You open your browser and see the blank address bar. The default prompt invites you to search Google or type a URL. You type an address, press Enter, and the website appears almost instantly. But what actually happens behind the screen during that split second?
A massive sequence of invisible steps kicks off right away. First, your browser checks its local cache to locate the site’s IP address. If it cannot find it, it contacts a Domain Name System (DNS) server. The DNS acts like the phonebook of the internet, converting readable domain names into numerical IP addresses.
Once your computer knows the IP address, it initiates a connection with the target server. It completes a secure TCP handshake to ensure both sides can safely communicate. Next, your browser sends an HTTP request asking for the page data.
The web server processes this request and sends back a response containing HTML, CSS, and JavaScript files. Finally, your browser engine parses the code, paints the pixels, and displays the webpage on your screen.
Watch the video below to see every stage of this network journey visualized step by step.