The Internet is an open computer network. It links up individual computers used by people at their homes or offices. Web-sites are hosted by Internet Service Provider (ISP) identifiable by their Internet Protocol Addresses (IP address).
To obtain access to a web-site, a user has to type on the browser's provided space the IP Address. Since IP Addresses are a series of digits, not easy to be remembered, a user can type its English spelt equivalent and upon pressing the 'ENTER' button, it passes through the Domain Name Service (DNS) name server and gets access to the web-site. This happens without the notice of the user.