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The domain name system (DNS) is a system that stores and associates many types of information with domain names, but, most importantly, it translates domain names (computer hostnames) to IP addresses. It also lists mail exchange servers accepting e-mail for each domain. In providing a worldwide keyword-based redirection service, DNS is an essential component of contemporary Internet use.

Useful for several reasons, the DNS is most well-known for making it possible to attach easy-to-remember domain names (such as "wikipedia.org") to hard-to-remember IP addresses (such as 207.142.131.206). Humans take advantage of this when they recite URLs and e-mail addresses. Less recognized, the domain name system makes it possible for people to assign authoritative names, without needing to communicate with a central registrar each time.

A brief history of the DNS


The practice of using a name as a more human-legible abstraction of a machine's numerical address on the network predates even TCP/IP, all the way back to the ARPAnet era. Originally, each computer on the network retrieved a file called HOSTS.TXT from SRI (now SRI International) which mapped an address (eg. 192.0.34.166) to a name (eg. www.example.net.) The Hosts file still exists on most modern operating systems either by default or through configuration and allows users to specify an IP address to use for a hostname without checking the DNS. This file is now used primarily for troubleshooting DNS errors or mapping local addresses to more organic names (the Hosts file can also be used for ad blocking, or it can be used by spyware to hijack a computer). Such a system had inherent limitations, because of the obvious requirement that every time a given computer's address changed, every computer that wanted to communicate with it would need an update to its Hosts file.

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RT @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
marioaldrete (Mario Aldrete) Tue, 15 Dec 2009 05:40:10 -0000
RT @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
RT @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
BillDrews (Bill Drews) Tue, 15 Dec 2009 05:37:26 -0000
RT @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
RT @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
AlanEggleston (Alan Eggleston) Tue, 15 Dec 2009 05:36:38 -0000
RT @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
RT: @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
TanNg (Nguyễn Thế Tân) Tue, 15 Dec 2009 05:36:34 -0000
RT: @mattcutts: Bit.ly announces bit.ly Pro: http://bit.ly/7kb9mh White-label domain names and a nice dashboard--good stuff.
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404 gTLD-MoU - The international framework in which policies for the administration and enhancement of the Internet's generic Domain Name System (DNS) are developed and deployed.

ICANN - The non-profit corporation responsible for IP address allocation, protocol parameter assignment, as well as domain name and root server system management functions.
Meta Description: [ ICANN - Internet Corporation for Assigned Names and Numbers ]

The Register - Cracking down on cyberspace land grabs - Reports on an IP-block hijacking when Los Angeles County had been hit by a growing type of hi-tech fraud, in which large, and usually dormant, segments of the Internet's address space are taken away from their registered users through an elaborate shell game of forged letters, ephemeral domain names and anonymous corporate fronts.

Tina's Free Live Webcam - Research documenting 4525 domains registered by 'Tina's Free Live Webcam.' Each domain was previously used by another registrant, and Tina seems to have specifically sought to re-register the domains as they became available. Includes a discussion of the scope of this problem, policy implications, and possible solutions.
Meta Description: [ Research documenting 4525 domains registered by 'Tina's Free Live Webcam.' Each domain was previously used by another registrant, and Tina seems to have specifically sought to re-register the domains as they became available. Includes a discussion of the scope of this problem, policy implicatio... ]

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