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A public switched data network (PSDN) is a network for providing data services via a system of multiple wide area networks, similar in concept to the public switched telephone network (PSTN). [3] A PSDN may use a variety of switching technologies, including packet switching , circuit switching , and message switching . [ 3 ]
In some countries, however, the job of providing telephone networks fell to government as the investment required was very large and the provision of telephone service was increasingly becoming an essential public utility. For example, the General Post Office in the United Kingdom brought together a number of private companies to form a single ...
The collection of addresses in the network is called the address space of the network. Examples of telecommunications networks include computer networks, the Internet, the public switched telephone network (PSTN), the global Telex network, the aeronautical ACARS network, [1] and the wireless radio networks of cell phone telecommunication providers.
Through the use of multicasting, there have also been a number of new Spanish-language and non-commercial public TV networks that have launched. Free-to-air networks in the U.S. can be divided into five categories: Commercial networks – which air English-language programming to a general audience (for example, ABC, CBS, NBC, and Fox);
Some large / 8 blocks of IPv4 addresses, the former Class A network blocks, are assigned in whole to single organizations or related groups of organizations, either by the Internet Corporation for Assigned Names and Numbers (ICANN), through the Internet Assigned Numbers Authority (IANA), or a regional Internet registry.
A telephone network is a telecommunications network that connects telephones, which allows telephone calls between two or more parties, as well as newer features such as fax and internet. The idea was revolutionized in the 1920s, as more and more people purchased telephones and used them to communicate news, ideas, and personal information. [ 1 ]
In telecommunication, a public land mobile network (PLMN) is a combination of wireless communication services offered by a specific operator in a specific country. [1] [2] A PLMN typically consists of several cellular technologies like GSM/2G, UMTS/3G, LTE/4G, NR/5G, offered by a single operator within a given country, often referred to as a cellular network.
Networks designed solely for use by municipal services (fire, police, planners, engineers, libraries, etc.). Municipal funds are used to establish and run the network; Quasi-public networks for use by both municipal services and private users owned by the municipality but operated for profit by private companies ("private hot spots").