Glossary definition: Domain Name System (DNS)

Understanding the Domain Name System (DNS)

The Domain Name System (DNS) is a hierarchical distributed naming system for computers, services, or other resources connected to the Internet or a private network. It associates various information with domain names assigned to each of the participating entities. Most prominently, it translates domain names, which can be easily memorized by humans, to the numerical IP addresses needed for the purpose of locating and identifying computer services and devices with the underlying network protocols. The Domain Name System is an essential component of the functionality of the Internet, as it provides a worldwide, distributed directory service. It is responsible for translating domain names into the corresponding IP addresses, as well as providing other information such as mail routing information, and providing a list of available services associated with a domain. The Domain Name System is an integral part of the functionality of the Internet, as it provides a worldwide distributed directory service.