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.
|
|
|
|
TCP/IP Domain Name System (DNS)
The creation of host
tables to map computer names to addresses
greatly improved the usability of the early Internet and the TCP/IP
protocol suite that implemented it. Unfortunately, while the host table
name system worked well when the internetwork was small, it did not
scale particularly well as the Internet started to grow in size and
complexity. The name system had to stay but the use of host tables had
to be dispensed with in favor of a newer, more capable system.
Over the period of several years,
many engineers worked to create a system that would meet not just the
needs of TCP/IP internetworks of the time, but also of the future. The
new name system was based on a hierarchical division of the network
into groups and subgroups, with names reflecting this structure. It
was designed to store data in a distributed fashion to facilitate decentralized
control and efficient operation, and included flexible and extensible
mechanisms for name registration and resolution. This new name system
for TCP/IP was called the Domain Name System (DNS).
In this section I describe the concepts
behind TCP's Domain Name System, as well as its operation. The section
is divided into four subsections. The first provides and overview of
DNS, including a description of its characteristics and components.
The next three subsections describe how DNS implements each of the three
primary name system functions: the DNS
name space and architecture; the DNS name registration process, including
hierarchical authorities and administration; and the DNS name resolution
process, focusing on how name servers and resolvers work. Finally, I
have a topic that briefly highlights the changes made to DNS to support
the new version 6 of the Internet Protocol, and its much longer addresses.
Note: Now, for a quick terminology note. First, even though the abbreviation DNS usually stands for Domain Name System, you will also sometimes see the S stand for other words, especially Service or Server. Second, some documents refer to this name system as the DNS. Most people just say DNS without the definite article, and that's the convention I follow here as well. |
Quick navigation to subsections and regular topics in this 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! |
|
|
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.
|