One effect of these trends has been a growing overlap of the computer and communications industries, from component fabrication to system integration. Another result is the development of integrated systems that transmit and process all types of data and information. Both the technology and the technical standards or organizations are driving toward integrated public systems that make virtually all data and information sources around the world easily and uniformly accessible.
This topic aims to provide a unified view of the broad field of data and computer communications. The organization of the hook reflects an attempt to break this massive subject into comprehensible parts and to build Piece by piece. A survey of the state of the art. This introductory chapter begins with a general model of communications.
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