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Domain Name System (DNS)

Knowledge Base/Glossary: "The Domain Name System (DNS) is a hierarchical decentralized naming system used to translate human-readable domain names into numerical IP addresses that computers can understand. It is a critical part of the internet, as it allows users to access..."

The Domain Name System (DNS) is a hierarchical decentralized naming system used to translate human-readable domain names into numerical IP addresses that computers can understand. It is a critical part of the internet, as it allows users to access websites and other online resources using easy-to-remember names instead of having to remember numerical IP addresses.

The DNS consists of a network of servers that work together to translate domain names into IP addresses. When a user types a domain name into their web browser, their computer sends a request to a DNS server to resolve the domain name into an IP address. The DNS server then responds with the IP address of the server hosting the website associated with that domain name.

The DNS is organized into a hierarchical structure, with the root level at the top. At the root level, there are 13 authoritative DNS root servers that are responsible for managing the top-level domain names, such as .com, .net, and .org. Below the root level, there are domain name registrars, which are responsible for managing the registration of domain names within their specific top-level domain.

In addition to translating domain names into IP addresses, the DNS is also used to store other types of information, such as the location of mail servers and the keys used for email authentication methods like DKIM and SPF.

In summary, the DNS is a system that translates human-readable domain names into numerical IP addresses, allowing users to access websites and other online resources using easy-to-remember names. It is organized into a hierarchical structure, with root servers at the top and domain name registrars responsible for managing the registration of specific domain names.

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