The Domain name server also known as  "DNS" are the servers or same machines that finds a particular "IP-ADDRESS" from the domain name. In other words, Domain Name Servers (DNS) are the Internet's equivalent of a phone book. They maintain a directory of  domain names  and translate them to Internet Protocol (IP) addresses. This is necessary because, although domain names  are easy for people to remember, computers or machines, access websites based on IP addresses.