Transcription of William Stallings Data and Computer …
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William Stallings Data and Computer …
1 William StallingsData and Computer CommunicationsChapter 1 IntroductionA Communications Model Source generates data to be transmitted Transmitter Converts data into transmittable signals Transmission System Carries data Receiver Converts received signal into data Destination Takes incoming data2 Simplified Communications Model - DiagramKey Communications Tasks Transmission System Utilization Make efficient use of shared transmission facilities Multiplexing Congestion control Interfacing A device must interface with the transmission system Signal Generation Signals must be Capable of being propagated through transmission system Interpretable as data at the receiver3 Key Communications Tasks Synchronization Receiver must know When a signal begins to arrive and when it ends Duration of a signal Exchange Management Both devices may transmit simultaneously or take turns Am
1 William Stallings Data and Computer Communications Chapter 1 Introduction A Communications Model Source generates data to be transmitted Transmitter
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