Computers do not understand and interact in Latin or any languages like humans do. Although they are good at identifying and interacting with numbers or digits (clever they are). In the networking based system interaction of two computing devices is a necessity.
Therefore, for the communication to be possible and bridge the human language to computer language, DNS or Domain Name Server system converts Human language-based commands (Internet domain and host names) to digits or numerical address protocols popularly known as Internet Protocol. DNS automatically converts the names we type in our Web browser address bar to the IP addresses of Web servers hosting those sites.
There are four hierarchical naming systems of DNS: Resolving Name Server, Root Name Server, TLD Name Server, and Authoritative Name Server.