A network is a group of computers that are connected and can communicate with one another.
“The Internet” is a worldwide network of computers, connected by TCP/IP, a protocol that all of the computers understand. It’s an agreement about how the computers exchange information.
All computers connected to the Internet have an IP address consisting of four numbers separated by periods (for example: 220.127.116.11).
To make addresses easier for humans to remember, DNS (domain name service) associates domain names like www.yourdomain.com with the numeric address of the computer where that domain is hosted.
When you type in a domain name, your computer requests web page files from the address of the computer where the files are located. These files are sent to your computer, and displayed in your browser.