Internet is a medium by which computers link to each other and exchange information.
Understanding the mode of working of Internet involves acquaintance with its terminology. Every computer is recognized by another through its TCP/IP (Internet Protocol) address. Depending on the type of Internet connection you opt for, your Internet Service Provider (ISP) assigns an IP number for you.
When you enter the domain name, the DNS (domain name server) gives you IP. This IP then takes the request to the domain's ISP, and then back to you through the NAP server and your ISP. The resultant is the search result.