https://app.knowbase.one/vault/rfc/docid/4742
RFC4343: Domain Name System (DNS) Case Insensitivity Clarification
Network Working Group D. Eastlake 3rd Request for Comments: 4343 Motorola Laboratories Updates: 1034, 1035, 2181 January 2006 Category: Standards Track Domain Name System (DNS) Case Insensitiv...