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The '''TLD''' is always the last part of a domain name, such as [[.com]], [[.net]], [[.us]], etc.<ref>[http://www.pcmag.com/encyclopedia_term/0,2542,t=TLD&i=52942,00.asp]</ref>
The '''TLD''' is always the last part of a domain name, such as [[.com]], [[.net]], [[.us]], etc.<ref>[http://www.pcmag.com/encyclopedia_term/0,2542,t=TLD&i=52942,00.asp]</ref>
Each TLD is managed by a single [[:Category:Registries|Registry]].
Each TLD is managed by a single [[Registry]].
==History==
The need for a hierarchical [[DNS]] arose with the popularity of the Internet in academic spheres in the early 1980s. This eventually necessitated a de-centralized Internet. Communications between [[The Stanford Research Institute NIC]] and other institutions include plans to create a hierarchical [[DNS]], found in [[http://www.rfc-editor.org/rfc/rfc805.txt RFC 805]], a group document from 1982. This document outlines many of the basics of the eventual [[DNS]], including the need for [[TLD]]s to provide a fixed starting point for queries, and the need for [[SLD]]s to be unique. This, in turn, would necessitate the need for a [[registrar]] type of administration, and help the nascent [[IT]] community recognize that the distribution of responsibility for each domain to individual name servers would provide administrative advantages.<ref>[http://www.livinginternet.com/i/iw_dns_history.htm Living Internet]
==Varieties of TLDs==
==Varieties of TLDs==
There are different types of TLDs.
There are different types of TLDs.
* [[CCTLD]]
* [[CCTLD]]
These TLDs operated in different manners, and can be categorized in some simple ways:
These TLDs operate in different manners, and can be categorized in some simple ways:
* Operating Mode
* Operating Mode
**Restricted - Requiring Local Physical Address, Local Tax ID, or other specific criteria be met to qualify in order to provision a name.
**Restricted - Requiring Local Physical Address, Local Tax ID, or other specific criteria be met to qualify in order to provision a name.
**Sponsored - A variation on Restricted, the applicant for a domain in an [[STLD]] must meet the requirements within that TLD (ie. [[.jobs]] would require that Human Resources be involved, [[.travel]] would require certain Travel criteria are met, etc).
**Sponsored - A variation on Restricted, the applicant for a domain in an [[STLD]] must meet the requirements within that TLD (ie. [[.jobs]] would require that Human Resources be involved, [[.travel]] would require certain Travel criteria are met, etc).
== Related Articles ==
== Related Articles ==