Types of signals: Analog and Digital • Analog: – Continious waveforms – Passes through communications medium – Used for video, audi and voice communications • Digital: Discrete waveforms Transmits data coded into two discrete states as 1-bits or 0-bits Used för data communications
Communications Processers and Software• Front-end processor• Concentrator• Controller• Multiplexer
Network topologies• Star network• Bus network• Ring network
Local Area Networks (LAN´s) &Wide Area Networks (WAN´s)
Network services and Broadband Technologies• Value-added networks (VAN´s)• Other network services
Electronic Commerce & Electronic Business Technologies• Electronic mail and groupware = E-mails and Groupware• Voice mail and fax• Teleconferencing• Dataconferencing• Videoconferencing• Digital information services, distance learning and E-learing• EDI = Electronic data Interchange •
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