RFC - 2181
Clarifications to the DNS Specification
Authors: R. Elz [University of Melbourne], R. Bush [RGnet, Inc.]
Date: July 1997
Category: Proposed Standard
Status
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
要約 (Abstract)
This document considers some areas that have been identified as
problems with the specification of the Domain Name System, and
proposes remedies for the defects identified. Eight separate issues
are considered:
- IP packet header address usage from multi-homed servers,
- TTLs in sets of records with the same name, class, and type,
- correct handling of zone cuts,
- three minor issues concerning SOA records and their use,
- the precise definition of the Time to Live (TTL)
- Use of the TC (truncated) header bit
- the issue of what is an authoritative, or canonical, name,
- and the issue of what makes a valid DNS label.
- IP packet header address usage from multi-homed servers,
- 同じ名前、クラス、タイプを持つレコード集合の TTL について
- ゾーンカットの正しい取り扱い方
- SOA レコードとその使い方に関するみっつの事柄
- 有効期間 (Time to Live, TTL) の厳密な定義
- TC (切りつめ) ヘッダービットの使い方について
- 権威ある(authoritative)もしくは 正規(canonical)の名前について
- 正しい DNS ラベルについて
The first six of these are areas where the correct behaviour has been
somewhat unclear, we seek to rectify that. The other two are already
adequately specified, however the specifications seem to be sometimes
ignored. We seek to reinforce the existing specifications.
始めの 6 つは正しい動作に不明確な部分があった領域で、これを正そうとしている。
後のふたつはすでにきちんと定義されているにもかかわらずその定義がしばしば
無視されているものである。既存の定義を再確認しようとしている。
2002-06-22
訳 前野年紀
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