Basic Structure
The internet consists of millions of computers, servers, and devices all connected together through a web of cables, fiber optics, and wireless signals. Your computer or phone connects to the internet through an Internet Service Provider (ISP), which is a company that provides internet access. These devices don't connect directly to each other. Instead, they connect through routers, which are like traffic directors that figure out where information needs to go.
How Data Travels
When you send a message or download a file, your data is broken into tiny pieces called packets. Each packet contains a portion of your information plus addresses showing where it came from and where it's going, similar to a mailing address on an envelope. These packets travel across the internet through different paths, bouncing from router to router until they reach their destination. The packets may not all travel the same route, but they all arrive at the destination computer, which reassembles them back into the original message or file.
Protocols and Rules
For all these computers to communicate successfully, they follow agreed-upon rules called protocols. The most important protocol is TCP/IP, which ensures packets are sent correctly and arrive in the right order. TCP/IP works like a language that all internet devices understand. Without these standardized rules, computers from different manufacturers using different software couldn't communicate with each other.
Servers and Websites
Websites you visit are stored on powerful computers called servers that are connected to the internet 24/7. When you type a website address into your browser, your request travels to that server, which sends back the website's files to your computer. Your browser then displays these files as the webpage you see. Email, online games, and streaming services all work similarly by connecting your device to servers that store and deliver the content.
IP Addresses and Domain Names
Every device on the internet has a unique number called an IP address, similar to a phone number or home address. IP addresses look like four numbers separated by periods, such as 192.168.1.1. However, instead of memorizing IP addresses, we use domain names like google.com or wikipedia.org. A special service called DNS translates these easy-to-remember names into the actual IP addresses that computers need to find each other. 
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