Communication Networks
"A telecommunications network is a system consisting of communicating devices, such as terminals, an interconnecting media, such as cable, and a means of establishing communicating' , paths through the ,media between the communicating devices" (John feather, ed., 1997), In other words communications networks are made up of transmission lines, concentrators, switching mechanisms and non-data processing components. Networks cater for people with information intensive occupations. Specialised types of network have been developed in the last fifteen years or so, and new ideas are emerging almost daily. The main driving forces for these have been the arrival of compact, powerful and cheap technology and the need for business communications.