Data Communication in Simple Terms Communication means sharing information; it may be remote or local. The definition of telecommunication means communicating at a distance. Data Communication is the exchange of information between devices via some form of transmission medium such as a wire cable. The potency of Data Communication system depends on three characteristics that are Fundamental:. Delivery: When the message sent by the source System is correctly delivering to the correct destination, this is called Delivery. Accuracy: The system ought to deliver the message correctly on the destination System, should any information transmitting to one system to another gets altered or changed and the same uncorrected bits are received on the destination system effects in no use to read the message.
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Timeliness: The message must deliver the information in a timely manner. It is useless if the information is transmitted and delivered late to the destination systems.
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The five network components that Data Communication deals with are: Message: The message is data or the information to be transmitted or communicated form source system to the address system. This message can be text form, graphic form, audio form or any combination of those forms. Sender: The sender is the source system or device which sends the message. It can be a work station, a computer, phone etc. Receiver: The receiver is the destination system which gets the message from source system or sender device. It might be a computer, workstation, or phone among other things. Medium: A transmission medium is a physical path through which a message travels from sender device to the receiver device or from the source to destination system. Protocol: A protocol is set of regulations and rules that regulate the data communication. It symbolizes a link establishment between the source systems and also the destination system that’ll convey. The connection might not be made between the source and destination system or between the sender and receiver device without this protocol. In communicating, data representing may be in pictures, text, images audio and video. The text is represented as bit patterns, a sequence of bits. Distinct sets of bits patterns have been designed to represent by text symbols known as code. These data portrayal follow few standards: ASCII: The American National Standards Institute (ANSI) developed a code called American Standard code for Information Interchange (ASCII). To represent it, this code uses 7 bits for every symbol. Extended ASCII: This is much like the ASCII but chooses 1bit more than ASCII code to make size of every pattern 1 byte (8 bits). This Extended ASCII adds zero to form a pattern of 1 byte, for example, 01111111. UNICODE: This Unicode was designed to comprehend distinct languages as before developed codes only understood English. A coalition of software and hardware design is called Unicode. This will represent up to 65536 symbols and is 16-bits. ISO: This is International Organization for Standardization, they designed a code a pattern of 32 bits. Numbers & Images also use bit patterns, an image is divided into matrix of pixels.