Summary  
This chapter explains the client–server request–response cycle, where a browser sends a request to a server, the server processes it, and then returns a response that the browser renders.  

General domain of usage  
Web applications



When you open a website, something happens behind the scenes.

For example, when you type a website address into your browser and press Enter, the browser sends a request asking for data.

That request goes to a **server** — a computer that stores and processes website data.

The server prepares a response and sends it back to your browser.

Your browser then displays the result as a webpage.

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## **Simple Flow**

The process looks like this: browser → request → server → response → browser

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## **Real-Life Example**

Imagine opening a website like Google or any app.

* You type the address or click a link;
* Your browser sends a request;
* The server processes it;
* The page loads with content.

All of this happens in just a fraction of a second.


Every web application works this way.


Understand how the web works and how frontend, backend, and databases connect to form a complete application. Explore the role of fullstack development and the technologies used across the track, including HTML, CSS, JavaScript, React, Node.js, Express.js, and MongoDB. Build a clear mental model of how data flows through an application before starting hands-on development.

What Is the Web and How It Works

Simple Flow

Real-Life Example