Technologies that allow the transmission of analogue or digital information signals over a point-to-point or a point-to-multipoint through the use of communication channels or transmission media, such as optical fibre, copper wire, or wireless communication channels. The information or data are usually transmitted as an electromagnetic signal, such as radio waves or microwaves.
DADOS FORNECIDOS PELA ESCO (COMISSÃO EUROPEIA) E O*NET (DEPARTAMENTO DO TRABALHO DOS EUA)