https://app.knowbase.one/vault/rfc/docid/928
RFC9660: The DNS Zone Version (ZONEVERSION) Option
Internet Engineering Task Force (IETF) H. Salgado Request for Comments: 9660 NIC Chile Category: Standards Track M. Vergara ISSN: 2070-1721 DigitalOcean ...
https://app.knowbase.one/vault/rfc/docid/2570
RFC2308: Negative Caching of DNS Queries (DNS NCACHE)
Network Working Group M. Andrews Request for Comments: 2308 CSIRO Updates: 1034, 1035 March 1998 Category: Standards Track Negative Caching of DNS Querie...