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Data Communication Process and Types of Data Transmission
by zafarimran on Nov 26, 2011
Communication means the exchange of information or messages. The process of transferring data from one location to another is called Data Communication. In this process, data is transmitted electronically from one location to another by using standard methods.
Today, computer networks are commonly used for data communication. For this purpose, we use cables, telephone lines, computers, and wireless devices that are linked in a network.
Types of Data Transmission: Therefore, data transmission is divided into:
(i) Analog data transmission.
(ii) Digital data transmission.
(i) Analog Data Transmission:
The transfer of data from one place to another in the form of analog signals or in the form of continuous waves is called analog data transmission. The analog signal consists of a continuous electrical wave. The light waves, sound waves or radio waves are examples of analog signals.
(ii) Digital Data...Read More >>
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Data Communication Protocols and Important Transmission Protocols
by zafarimran
All machine based communications must follow certain set of rules for exchange of data between nodes connected to a network. The rules to send and receive data are called protocols. These rules are defined in the network software. A protocol defines;
Which is communicated?
How it is communicated?
When it is communicated?
Elements of Protocol:
1. Syntax:
Syntax refers to the format or structure of data. The protocol accepts the data according to the predefined format. For example, a protocol may expect the format of data as;
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