https://app.knowbase.one/vault/rfc/docid/781
RFC9520: Negative Caching of DNS Resolution Failures
Internet Engineering Task Force (IETF) D. Wessels Request for Comments: 9520 W. Carroll Updates: 2308, 4035, 4697 M. Thomas Category: Standards Track Verisign ISS...
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...