What is a domain?
The primary purpose of domain names and Internet domain name system (DNS) is to translate the IP addresses for each active node in the network, storable and easy terms to find. This abstraction enables any service (network) can move from one geographical location to another on the Internet, even if the change implies that will have a different IP address.
Without the help of the domain name system, Internet users would have to access each web service using the IP address of the node (for example, you would use instead of http://example http://126.96.36.199. com). Also, reduce the number of possible sites, as it is now common for a single IP address is shared by multiple domains.