Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

The whole site in one document for easy reference!
The TCP/IP Guide

Custom Search







Table Of Contents  The TCP/IP Guide
 9  TCP/IP Application Layer Protocols, Services and Applications (OSI Layers 5, 6 and 7)
      9  Name Systems and TCP/IP Name Registration and Name Resolution
           9  TCP/IP Name Systems: Host Tables and Domain Name System (DNS)
                9  TCP/IP Domain Name System (DNS)
                     9  DNS Overview, Functions and Characteristics

Previous Topic/Section
DNS Overview, Functions and Characteristics
Previous Page
Pages in Current Topic/Section
1
23
Next Page
DNS Design Goals, Objectives and Assumptions
Next Topic/Section

DNS Overview, History and Standards
(Page 1 of 3)

The aversion that most people have to trying to remember numeric identifiers led to the very quick adoption of a name system for devices on the predecessors of what we now call the Internet. In the 1960s and early 1970s, names were given to machines, and these names maintained in host tables. The TCP/IP host table name system worked well for a number of years, with a centrally-maintained master list used by device administrators to ensure a consistent view of the network.

Unfortunately, such a system only works well when the number of devices is small. As the budding Internet grew, numerous weaknesses became apparent in the host table method, as I detailed in the section describing that system. Furthermore, the problems with the system weren't something that could be easily “patched” with small changes; the problems were structural, part of the basic idea of host tables as a whole. A completely new approach was needed for how names would be used on the Internet.

Early DNS Development and the Move to Hierarchical Domains

The most important “paradigm shift” made by the TCP/IP engineers was the decision to change the name system from one that used a single, centralized list of names to a more decentralized system. The idea was to create a structured topology where names were organized into domains. This idea was first introduced in the September 1981 RFC, 799, entitled Internet Name Domains.

RFC 799 actually describes more the mechanics of delivering electronic mail messages between domains than the domains themselves. Interestingly, the standard assumes a flat structure of domains in its discussion, while mentioning the possibility of creating a hierarchical structure instead. It was in fact the decision to go to such a hierarchical name space for domains that led to the creation of the Domain Name System (DNS) in the form in which we know it today.

Many different RFC documents were published in the early 1980s, describing the development of different aspects of DNS. The first real milestone in DNS's history was probably the publishing, in November 1983, of a “triplet” of initial documents discussing DNS concepts, shown in Table 162.


Table 162: Documents Discussing TCP/IP Domain Name System (DNS) Concepts

RFC Number

Name

Description

881

Domain Names Plan and Schedule

Discusses the issues involved in implementing the new DNS name system and how to migrate from the older host table system.

882

Domain Names: Concepts and Facilities

Describes the concepts and functional elements of DNS in fairly extensive detail. Includes a discussion of the name space, resource records, and how name servers and resolvers work.

883

Domain names: Implementation Specification

Provides the “nitty gritty” details on DNS messaging and operation.


Previous Topic/Section
DNS Overview, Functions and Characteristics
Previous Page
Pages in Current Topic/Section
1
23
Next Page
DNS Design Goals, Objectives and Assumptions
Next Topic/Section

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.