The Domain Name System DNS is a hierarchical database of domain names and their corresponding IP addresses. It is used to translate human-readable domain names into the numerical addresses used by computers.

Domain name systems are essential for the functioning of the Internet. Without them, users would have to remember long strings of numeric addresses for every website they wanted to visit.

Domain name systems also allow website owners to register domain names that are different from their actual IP addresses. This is useful for hiding the true location of a website from potential attackers.

The Domain Name System DNS is maintained by the National Institute of Standards and Technology (NIST). It is a distributed database that is constantly growing as new domain names are registered and old domain names are renewed.

The Domain Name System DNS is a critical part of the Internet infrastructure and is used by millions of people every day.