Domain Name System or Server
computer communicate with each other through the internet with the help of IP(Internet protocol) address- it is a number assigned to every device connected to the computer network to uniquely identify the particular network.
IP address is long enough to remember by humans like 126.96.36.199
So to make it easier every IP address is replaced by the domain name which is simply a name easy to remember for example google.com
Domain name system resolves the conversion from domain name to IP address
for example, if we type www.google.com the DNS will automatically convert this name to its IP address at the backend
The conversion takes place by matching the domain name with the IP address which is stored in Domain name server database.