DNS Terminology
draft-ietf-dnsop-terminology-bis-05

Document Type Active Internet-Draft (dnsop WG)
Last updated 2017-03-13
Stream IETF
Intended RFC status Best Current Practice
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Network Working Group                                         P. Hoffman
Internet-Draft                                                     ICANN
Obsoletes: 7719 (if approved)                                A. Sullivan
Intended status: Best Current Practice                               Dyn
Expires: September 14, 2017                                  K. Fujiwara
                                                                    JPRS
                                                          March 13, 2017

                            DNS Terminology
                  draft-ietf-dnsop-terminology-bis-05

Abstract

   The DNS is defined in literally dozens of different RFCs.  The
   terminology used by implementers and developers of DNS protocols, and
   by operators of DNS systems, has sometimes changed in the decades
   since the DNS was first defined.  This document gives current
   definitions for many of the terms used in the DNS in a single
   document.

   This document will be the successor to RFC 7719.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on September 14, 2017.

Copyright Notice

   Copyright (c) 2017 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of

Hoffman, et al.        Expires September 14, 2017               [Page 1]
Internet-Draft               DNS Terminology                  March 2017

   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
   2.  Names . . . . . . . . . . . . . . . . . . . . . . . . . . . .   3
   3.  DNS Header and Response Codes . . . . . . . . . . . . . . . .   9
   4.  Resource Records  . . . . . . . . . . . . . . . . . . . . . .  10
   5.  DNS Servers and Clients . . . . . . . . . . . . . . . . . . .  12
   6.  Zones . . . . . . . . . . . . . . . . . . . . . . . . . . . .  16
   7.  Registration Model  . . . . . . . . . . . . . . . . . . . . .  21
   8.  General DNSSEC  . . . . . . . . . . . . . . . . . . . . . . .  22
   9.  DNSSEC States . . . . . . . . . . . . . . . . . . . . . . . .  26
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  28
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  28
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  28
     12.1.  Normative References . . . . . . . . . . . . . . . . . .  28
     12.2.  Informative References . . . . . . . . . . . . . . . . .  31
   Appendix A.  Definitions Updated by this Document . . . . . . . .  34
   Acknowledgements  . . . . . . . . . . . . . . . . . . . . . . . .  34
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .  35

1.  Introduction

   The Domain Name System (DNS) is a simple query-response protocol
   whose messages in both directions have the same format.  (See
   Section 2 for a fuller definition.)  The protocol and message format
   are defined in [RFC1034] and [RFC1035].  These RFCs defined some
   terms, but later documents defined others.  Some of the terms from
   [RFC1034] and [RFC1035] now have somewhat different meanings than
   they did in 1987.

   This document collects a wide variety of DNS-related terms.  Some of
   them have been precisely defined in earlier RFCs, some have been
   loosely defined in earlier RFCs, and some are not defined in any
   earlier RFC at all.

   Most of the definitions here are the consensus definition of the DNS
   community -- both protocol developers and operators.  Some of the
   definitions differ from earlier RFCs, and those differences are
   noted.  In this document, where the consensus definition is the same
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