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   ELEMENTS OF COMPUTER NETWORK Sender Device Medium Network Devices Message Receiving Devices A  computer network  is a set of  computers  sharing resources located on or provided by  network nodes . Computers use common  communication protocols  over  digital   interconnections  to communicate with each other. These interconnections are made up of  telecommunication network  technologies based on physically wired, optical, and wireless  radio-frequency  methods that may be arranged in a variety of  network topologies . 1.Sender Device -  A sender device is an electronic component that converts the digital signal from the encoder into an analogue signal that can travel through the wire and be heard by the reciever.The transmitter is sometimes reffered to as the modulator. AS A SENDER ROLE ;  the communication process includes selecting the type of message, analyzing the receiver, using the you-vie...