{ "content": "

The DOMAIN-NAME-SYSTEM<\/a><\/h1>

The DNS<\/a> is a fundamental technology of the INTERNET<\/a> that functions as a decentralized directory. It maps DOMAIN-NAMES<\/a> to numerical IP-ADDRESSES<\/a>, allowing users to reach websites without needing to remember complex sequences of numbers. Originally conceptualized by PAUL-MOCKAPETRIS<\/a>, the system has evolved to handle billions of queries daily.<\/p>

The resolution process involves a hierarchy starting with the RECURSIVE-RESOLVER<\/a>, which queries the ROOT-SERVER<\/a>. From there, the request is passed to a TLD-SERVER<\/a> and finally to the AUTHORITATIVE-NAMESERVER<\/a>. This infrastructure is managed globally by organizations such as ICANN<\/a> and IANA<\/a>. For technical specifications, the IETF<\/a> maintains the relevant standards.<\/p>

To ensure integrity, DNSSEC<\/a> adds digital signatures to records. Modern implementations are often managed through services like Cloudflare<\/a> or Amazon Route 53<\/a>. These systems manage various DNS-RECORDS<\/a> including A, AAAA, and MX-RECORDS<\/a>.<\/p>