Metropolitan Area Network

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Besides the larger companies that connected their offices across an metropolitan area, universities and research institutions also adopted dark fibre as their metropolitan area network backbone. In West Berlin the BERCOM project built up a multifunctional broadband communications system to connect the mainframe computers that publicly funded universities and research institutions in the city housed. The BERCOM MAN project could progress at speed because the Deutsche Bundespost had already installed hundreds of miles of fibre optic cable in West Berlin. Like other metropolitan dark fibre networks at the time, the dark fibre network in West Berlin had a star topology with a hub somewhere in the city centre. The backbone of the dedicated BERCOM MAN for universities and research institutions was a optical fibre double ring that used a high speed slotted ring protocol developed by the GMD Research Centre for Innovative Computer Systems and Telephony. The BERCOM MAN backbone could thus support two times 280 Mbit/s data transfer.

The virtualized network poses challenges to network management systems -- and as more hardware components become virtualized, that challenge becomes even greater. This handbook discusses the steps IT must take to both build and corral their virtualized infrastructure.

Short for M etropolitan A rea N etwork, a data network designed for a town or city. In terms of geographic breadth, MANs are larger than local-area networks (LANs) , but smaller than wide-area networks (WANs) . MANs are usually characterized by very high-speed connections using fiber optical cable or other digital media.

A network consists of two or more computers that are linked in order to share resources (such as printers and CDs), exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams.

Priority Communications Limited is a leading player in telecommunications and data communications services to private, public and corporate organizations in Nigeria and sub Sahara African countries.

A technology that uses glass (or plastic) threads (fibers) to transmit data . A fiber optic cable consists of a bundle of glass threads, each of which is capable of transmitting messages modulated onto light waves.