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...
https://app.knowbase.one/vault/rfc/docid/8714
RFC8020: NXDOMAIN: There Really Is Nothing Underneath
Internet Engineering Task Force (IETF) S. Bortzmeyer Request for Comments: 8020 AFNIC Updates: 1034, 2308 S. Huque Category: Standards Track Verisign Labs IS...