Domain Name Servers

DNS is a system which is used by the computers and devices using internet to assign the IP addresses to the domain names. The Internet is based on the IP addresses therefore it requires that a domain name must me translated into IP address so it is easily located.

DNS works like a phone book as it assigns a IP address to a domain name so that computer can communicate to the domain selected. But unlike phone book it updates it self without effecting the end user.

When a system is connected to home network (ISP) it sends the information to router which assigns the network address which also includes the DNS information so that it can acknowledge when to translate the domain name to IP address.

It is easy to remember the alphabetical names of the domain such as http://www.example.com rather than the IP address such as  70.42.251.42.

You can avoid the look up process performed by the browser when you put in a domain name e.g http://www.google.com  (try it) by directly providing the IP address of that domain.

DNS translates these domain names using a huge database also assigning the time allocated for the domain name  hence there are multiple addresses are assigned to a single domain name.