Domain Name System (DNS)

The Domain Name System (DNS) associates various information with domain names; most importantly, it serves as the “phone book” for the Internet by translating human-readable computer hostnames, e.g. www.example.com, into IP addresses, e.g. 72.18.131.170, which networking equipment needs to deliver information. A DNS also stores other information such as the list of mail servers that accept email for a given domain. By providing a worldwide keyword-based redirection service, the Domain Name System is an essential component of contemporary Internet use.

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