Seven Common Misconceptions About Mean By Data Communication Systems

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Communication of the data plays a major role in any organization. With the growing use of Personal Computers, the computing power, the amount of data processed, is becoming a source of knowledge has to be communicated to others, so as to incorporate efficiency in the organization.

Communication is also an important activity, as most of the organizations now are widespread and we need to have the data communicated, else we need to maintain separate data files at different locations for the same data. Thus, to answer the problems, the communication systems have their birth.

Describe Data Communication with Full Briefly

We can take data communication as a process of sending data electronically from one Geographic Location to other, which is done usually by linking these locations using a network.

This networking, not only helps the data communications, but also permits one to share the available resources (information), update and analyze it. Computers to communicate are either linked through a direct cable, if they are in same premises, or using any other of networking, if they are wide spread, usually telecommunication lines are used for networking.

Forms of data Transmission

Data can be transmitted across the network in the following two terms:

Analog Data transmission

Here, the data transmitted, as a continuous wave from one terminal to other. For example, the telephone system use analog data transmission, where the signals are transmitted in a continuous wave form, the following figure illustrates analog data transmission.

Digital data Transmission

This method of data transmission, uses distinct “on” and “off” electricity states. The data is represented as “presence” i.e.,. “On” and “absence” i.e. “off” of electric pulses. These are represented using 1 and 0 respectively.

The digital data transmission is faster, when compared to analog. As most of the communication lines i.e. telephone lines, do work on analog data transmission, we use modem, an instrument, which converts analog data into digital form.

Data Transmission Techniques

Data in computer system exists as digital pulses, where as telephone lines are made to transmit analog pulses. When the data has to be transmitted through telephone lines, between computers, we need to do the conversion of data formats.

Modulation: Before data transmission from one computer to other, the data has to be converted from digital to analog, if telephone lines are used. The process of converting digital data, before transmission into analog data is known as modulation. We use the modem to this process.

Demodulation: The receiving computer has to reconvert the analog data received into digital form, which again is done by the modem.  This process of reconverting an analog signal into digital pulses is called demodulation.  The device which does the Modulation and Demodulation gets the name Modem, which signifies, the work.

Seven Common Misconceptions About Mean By Data Communication Systems

MOHIT BHARDWAJ

Hello Visitors, myself Mohit Bhardwaj working in blogging sector since last 8 years. my qualification in bachelor degree in computer science steam.

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