Domain is the identity of the company you own, on the Internet. When you start to get on the Internet, you are given an Internet protocol number. This is called IP Address (Internet Protocol address). Every computer on the Internet has an IP address. The IP address of the other computer must be recognized in order to establish a connection with another computer. For example, the IP address of your computer is 126.96.36.199 Other computers on the Internet will find you through this IP number. Domain is just an image of this number. So instead of typing the IP numbers in the address bar of your browser, you can access the desired site by typing in the domains encoded in O IP numbers. The domain makes it easier to use IP numbers that are difficult to keep in memory in this sense. Briefly, domain IP addresses are encoded as letters. It is important that your domain name is convenient, easy, and rememberable. When you connect to the Internet, your computer is assigned an IP address. However, most users' IP addresses are dynamic, meaning that your service provider is assigned an IP address that is currently blank. So the last number of your IP address changes on each connection. The IP address changes each time you turn on or off the modem.