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A generic top-level domain (gTLD) is one of the categories of top-level domains (TLDs) maintained by the Internet Assigned Numbers Authority (IANA) for use in the Domain Name System of the Internet. A top-level domain is the last label of every fully qualified domain name. The core group of generic top-level domains consists of the com, info, net, and org domains. In addition, the domains biz, name, and pro are also considered ''generic''; however, these are designated as ''restricted'', because registrations within them require proof of eligibility within the guidelines set for each. Historically, the group of generic top-level domains included domains, created in the early development of the domain name system, that are now sponsored by designated agencies or organizations and are restricted to specific types of registrants. Thus, domains edu, gov, int, and mil are now considered sponsored top-level domains, much like the ''themed'' top-level domains (e.g., jobs). The entire group of domains that do not have a geographic or country designation (see country-code top-level domain) is still often referred to by the term ''generic'' TLDs. The number of gTLD as of November 2015 exceeds 700 domains,〔http://newgtlds.icann.org/en/program-status/delegated-strings〕 and about 1,900 more are in the waiting list.〔https://gtldresult.icann.org/application-result/applicationstatus/viewstatus〕 ==Types== Overall, IANA distinguishes the following groups of top-level domains: *infrastructure top-level domain (arpa) *country code top-level domains (ccTLD) *internationalized top-level domains (IDNs) * *internationalized country code top-level domains * *testing top-level domains *generic top-level domains (gTLD) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Generic top-level domain」の詳細全文を読む スポンサード リンク
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