what is telecommunication
The transmission and reception of signals, writing, sounds, intelligence of any nature are possible by wire, radio, light beam or any other electronic means. Computer communication takes place via computer networks. Computerized telecommunication allows rapid information exchange to geographically distant sites. Data stored physically in one location may be accessed or utilized instantly and simultaneously at numerous other locations. Modern telecommunication techniques provide improved information exchange and more management control over dispersed parts of an office or organization. A local area network (LAN) is a communication system that links together the devices located in a small area such as an office building or a campus. A local area network uses special coaxial or fibber optic cables with appropriate interface units and belongs to the using organization. The transmission speed is very high and it is possible to connect together terminals, word processors and computers of different vendors. A LAN can integrate word processing and data processing and help optimize the use of costly resources such as storage devices and printers. It is also possible to link two LANs through a long- distance transmission line.
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