The DOMAIN-NAME-SYSTEM
The DNS is a fundamental technology of the INTERNET that functions as a decentralized directory. It maps DOMAIN-NAMES to numerical IP-ADDRESSES, allowing users to reach websites without needing to remember complex sequences of numbers. Originally conceptualized by PAUL-MOCKAPETRIS, the system has evolved to handle billions of queries daily.
The resolution process involves a hierarchy starting with the RECURSIVE-RESOLVER, which queries the ROOT-SERVER. From there, the request is passed to a TLD-SERVER and finally to the AUTHORITATIVE-NAMESERVER. This infrastructure is managed globally by organizations such as ICANN and IANA. For technical specifications, the IETF maintains the relevant standards.
To ensure integrity, DNSSEC adds digital signatures to records. Modern implementations are often managed through services like Cloudflare or Amazon Route 53. These systems manage various DNS-RECORDS including A, AAAA, and MX-RECORDS.