It can be seen that the domain name is the name of the internet unit and the address of the unit that accesses the network through the computer. If a company wants to establish its own homepage on the Internet, it must obtain a domain name, which is also composed of several parts, including numbers and letters. Through this address, people can find the company's home page and website on the internet, so as to find the required detailed information. Domain name is an important symbol of online units and individuals on the network, which plays a role of identification and facilitates others to identify and retrieve the information resources of an enterprise, organization or individual, so as to better realize resource sharing on the network. In addition to the identification function, in the virtual environment, domain names can also play the role of guidance, publicity and representation.