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An ending the IETF (glossary)IETF Internet Engineering Task Force The open body that writes internet standards such as DNS, EPP and RDAP. Full definition of IETF reserved in 2023, in RFC (glossary)RFC Request for Comments A numbered document in the series recording the internet's technical standards and practices. Full definition of RFC 9476, for names that do not belong to the DNS (glossary)DNS Domain Name System The internet's directory that links domain names to computer addresses. Full definition of DNS. Makers of other naming systems can place their names under it to avoid clashes with real TLDs (glossary)TLD top-level domain The last part of a domain name, after the final dot. Full definition of TLD. It will never be added to the DNS root.