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    How Websites Actually Work

    Atul Kabra4 min readUpdated
    मराठीत वाचा

    A website works through a conversation between two computers: your browser (the client) and a server (where the website lives). You type an address, your browser asks the server for the page, the server sends back files, and your browser turns those files into the page you see. That whole round trip usually takes well under a second.

    Let's slow it down and look at each step.

    The client and the server

    Every time you open a website, two roles are in play:

    • The client is the device making the request — your laptop or phone running a browser like Chrome or Firefox.
    • The server is a computer, usually running in a data centre, that stores the website's files and waits for requests.

    The client always asks; the server always answers. This back-and-forth is called the client-server model, and almost the entire web runs on it.

    What happens when you type a URL

    Imagine you type infoplanet.in and press Enter. Here is the sequence:

    1. DNS lookup. A web address like infoplanet.in is easy for humans, but servers are found by numeric IP addresses (such as 203.0.113.42). The Domain Name System (DNS) is the web's phone book — it translates the name into an IP address.
    2. The request travels. Your browser opens a connection to that IP address and sends an HTTP request: essentially a polite note saying "please send me the home page."
    3. The server responds. The server processes the request and sends back an HTTP response containing the page's files — HTML, plus links to CSS and JavaScript.
    4. The browser renders. Your browser reads the HTML structure, applies the CSS styling, and runs any JavaScript to build the final, interactive page.

    HTTP and HTTPS

    The language clients and servers speak is HTTP (HyperText Transfer Protocol). When you see HTTPS with the padlock icon, it means the same conversation is happening over an encrypted connection, so nobody in between can read your data. Modern sites use HTTPS by default — it protects passwords, payments, and everyday browsing.

    <!-- A tiny HTML page is all a server needs to send back.
     The browser receives text like this and turns it into a visual page. -->
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>My First Page</title>
  </head>
  <body>
    <h1>Hello from the server!</h1>
    <p>You are reading a page that travelled across the internet.</p>
  </body>
</html>

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    Frontend and backend, briefly

    What you see and click — text, buttons, layout — is the frontend, built with HTML, CSS, and JavaScript and rendered in your browser. What stores data, checks passwords, and decides what to send back is the backend, running on the server, often written in languages like PHP, Python, or JavaScript (Node.js). We cover this split in detail in Frontend vs Backend Development.

    Common mistakes

    • Confusing the website with the server. The website is a collection of files; the server is the computer that hands them out. One server can host many websites.
    • Thinking a URL is the same as an IP address. A URL is a human-friendly name. DNS does the translation behind the scenes — without it, you would have to memorise numbers.
    • Assuming pages are "downloaded once." Most pages make many requests — one for the HTML, then separate ones for images, stylesheets, fonts, and scripts.
    • Believing HTTPS only matters for shopping sites. Encryption protects every kind of browsing, including reading and logging in. Treat any site asking for information without HTTPS with caution.

    FAQ

    Is the internet the same as the web? No. The internet is the global network of connected computers. The web (websites and pages accessed through browsers) is one service that runs on top of the internet, alongside email and other services.

    Do I need to understand all this to build a website? Not on day one. But knowing the journey of a request makes everything else — HTML, CSS, JavaScript, and servers — click into place much faster.

    Keep learning

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    Atul Kabra

    Founder, Infoplanet

    Atul Kabra founded Infoplanet in 2001 and has spent over two decades teaching programming — C, C++, Java, databases and more — to students across Maharashtra.

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