The format of internet address or universal Resource Locator is WWW, Username, a host, domain:
WWW: World wide web is a server based application that allows the subscribers to access the services offered by the web.
Username: It is the first part of the address that identifies the individual or computer on the network.
HOST: It is the second part of the address which may be a computer, user, a service provider etc.
DOMAIN: It is the last part of the address which indicates the specific organization using the internet. Eg. Com, edu, net etc.