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A point of presence (PoP) is an artificial demarcation point OR interface point between communicating entities. It may include a meet-me-room. In the US, this term became important during the court-ordered breakup of the Bell Telephone system. A point of presence was a location where a long-distance carrier (IXC) could terminate services and provide connections into a local telephone network (LATA). An Internet point of presence is an access point to the Internet. It is a physical location that houses servers, routers, ATM switches and digital/analog call aggregators. It may be either part of the facilities of a telecommunications provider that the Internet service provider (ISP) rents or a location separate from the telecommunications provider. ISPs typically have multiple PoPs, sometimes numbering in the thousands. PoPs are also located at Internet exchange points and colocation centres. A web point of presence is an account, page, channel, board or other location, generally on a social networking service like Facebook, Twitter, YouTube, LinkedIn, SlideShare, etc., where an individual, persona, brand or corporate identity is represented and interacts with other members of that service or the public in general. These are generally in addition to a personal, professional or corporate website, though those may be considered to be a web point of presence as well. As of Jan, 2012, "enterprise class corporations (those with over 1,000 employees) had an average of 178 social media accounts" (aka corporate points of presence). A wireless communications point of presence is a wireless device, e.g., a cell phone, in an area where it is able to obtain service from a commercial wireless provider.〔(【引用サイトリンク】url=http://www.ctia.org/resource-library/glossary/archive/pops/ )〕 In cellular telephony documents the term PoPs is sometimes used interchangeably with the word customers. == See also == * Content delivery network 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「point of presence」の詳細全文を読む スポンサード リンク
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