Express Learning - Introduction to Information Technology by Pearson

13

Data Communication and Computer Networks

1. What is meant by the term ‘data communication’? What are its components?

Ans.:  Data communication is the exchange of data between two devices using some form of wired or wireless transmission medium. It includes the transfer of data, the method of transfer, and the preservation of the data during the transfer process. To initiate data communication, the communicating devices should be a part of an existing communication system. For data communication to be effective, the following three fundamental characteristics should be considered:

1. Delivery: The system must deliver data to the correct or the intended destination.
2. Accuracy: The system must deliver data accurately (error free).
3. Timeliness: ...