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Introduction to Data Communications - Coggle Diagram
Introduction to Data Communications
definition
the exchange of data between two devices via some form of transmission medium
5 components
medium
physical path for transmission
sender
devices sends message
message
the data to be communicated
receiver
device receives message
protocol
agreement between the communicating devices
Types of data
Text
Numbers
Image
Audio
Video
Characteristics of effectiveness
delivery
accuracy
timeliness
easy understanding
noise
Data Flow
half-duplex
both can transmit and receive but not at the same time
full-duplex
both can transmit and receive simultaneously(at the same time)
simplex
unidirectional communication
Data Transmission
Serial
Synchronous
Asynchronous
Parallel