The internet works by connecting devices worldwide through a network of cables, routers, and servers. Here’s a simplified breakdown:

1. **Devices & Connections**:
Your device (phone, laptop) connects to a local network (like Wi-Fi) provided by a **router**. The router links to an **ISP** (Internet Service Provider), which connects to the global network.

2. **Requesting Data**:
When you type a URL (e.g., `www.example.com`), your device sends a request. The **DNS** (Domain Name System) translates the URL into an **IP address** (like `93.184.216.34`), which identifies the website’s server.

3. **Data Transmission**:
Your request is split into **packets** (small data chunks). Routers guide these packets through the fastest paths to the server using protocols like **TCP/IP** (ensuring data arrives correctly).

4. **Server Response**:
The server processes your request (e.g., loading a webpage) and sends back the data as packets. Your device reassembles them into the webpage you see.

5. **Underlying Infrastructure**:
Submarine cables, satellites, and data centers form the physical backbone. Protocols like **HTTP/HTTPS** (for websites) and encryption (HTTPS) keep communication secure.

**Analogy**: Think of it like mailing a book. You send a request (letter), the post office (routers/ISP) routes it, the recipient (server) sends the book back in pieces (packets), and you reassemble it.