(Answered) Write the answer of the following questionsreview

Write the Answer of the following Questions:

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(a) What is Data transmission?

(b) State the methods of data transmission on a network.

Define the following terms:
•Modem.
•Acoustic coupler.
•Multiplexer.
•What is the purpose of a Modem, and where would a modem be used.
•Explain the term ‘Distributed system'.

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