11. Data Communication Network (cont'd)
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An example of this would be your PC dialing into a BBS (Bulletin Board System):

12. Data Flow

Data flow is the flow of data between 2 points. The direction of the data flow can be described as:

Simplex: data flows in only one direction on the data communication line (medium). Examples are Radio and Television broadcasts. They go from the TV station to your home television.

Introduction to Data Communications
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