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A '''Generic Top Level Domain''' ('''gTLD''') is an internet extension with three or more characters. It is one of the categories of the top level domain([[TLD]]) in the Domain Name System ([[DNS]]) maintained by the [[IANA|Internet Assigned Numbers Authority]]. There are 21 gTLDs in the root zone of the internet and they are categorized as:<ref>[http://www.iana.org/domains/root/db/# IANA Root Zone Data Base]</ref>

A '''Generic Top Level Domain''' ('''gTLD''') is an internet domain name extension with three or more characters. It is one of the categories of the top level domain ([[TLD]]) in the Domain Name System ([[DNS]]) maintained by the [[IANA|Internet Assigned Numbers Authority]]. There are currently 21 gTLDs in the [[Root Zone|root zone]] of the Internet and they are categorized as:

* '''generic''' ([[.com]],[[.info]], [[.net]], [[.org]]) which can be used for general purposes;

* '''generic''' ([[.com]],[[.info]], [[.net]], [[.org]]), which can be used for general purposes;

* '''sponsored,''' ([[.aero]], [[.asia]], [[.cat]], [[.coop]], [[.edu]], [[.gov]], [[.int]], [[.jobs]], [[.mil]], [[.mobi]], [[.tel]] and [[.travel]]) which can only be used by entities engaged within the specific industry;  

* '''sponsored''' ([[.aero]], [[.asia]], [[.cat]], [[.coop]], [[.edu]], [[.gov]], [[.int]], [[.jobs]], [[.mil]], [[.mobi]], [[.tel]], [[.travel]], and [[.xxx]]), which can only be used by entities engaged within the specific industry;  

* '''generic restricted''' ([[.biz]], [[.name]], [[.pro]]) which can be use only for their specified purposes and

* '''generic restricted''' ([[.biz]], [[.name]], [[.pro]]), which can be use only for their specified purposes and

* '''infrastructure''' ([[.arpa]]) is exclusively used to support operationally-critical infrastructural identifier spaces and it is operated by IANA.

* '''infrastructure''' ([[.arpa]]), which is exclusively used to support operationally-critical infrastructural identifier spaces and it is operated by IANA.<ref>[http://www.iana.org/domains/root/db/# IANA Root Zone Data Base]</ref>

The gTLDs are managed and operated by their sponsor organizations and or registry operators that were approved by the [[ICANN|Internet Corporation for Assigned Names and Numbers]].

The gTLDs are managed and operated by their sponsor organizations and or registry operators that were approved by the [[ICANN|Internet Corporation for Assigned Names and Numbers]].