1 Data Communication

1.1 Introduction

Data communication refers to the transfer of information from one place to another. The term “data” means an information that is digital in nature, i.e., binary ones and zeroes. Analog data includes TVs, radios, and telephone systems. In the vast majority of cases, communication is digital in nature, although at the source and at the final user point it is analog in nature.

A communication system includes a transmitter, a receiver, and a link connecting these two. The link can be copper wire, optical fiber, or microwave. The link is parallel in nature for short distances, while it is serial for long distances. Data communications involving digital data are mostly serial in nature. A simplified data communication ...

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