Communication means to an exchange of information between two or more parties and it can be exchange in a varity of way, that might be in the form of word, letters, messages drawing, body movement or any other symbols that represents the idea which make to other understandable. Data communication entails electronically exchanging data or information. It is the movement of computer information from one point to another by means of electrical or optical transmission system. This system often is called data communication networks. In today's computing world, data refers to facts, statistics, pictures , voice and other information that is digitally coded and intelligible to variety of electronic machines.
The key technology of the information age is computer communications. The value of high-speed data communication network is that it brings the message sender and receiver closer together in time. Data communication and networking is a truly global area of study. It facilitates more efficient use of computers and improves the day to day control of business by providing faster information flow. The information society where information and intelligence are the key drivers of personal, business, and national success has arrived. Data communication is the principle enabler of the rapid information exchange and will become more important than the use of computer themselves in the future.
To be more familiar that what is data communication and its capabilities along with its limitation, we have to be familiar with the data communication media, components of data communication.
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