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Data Communication in Simple Terms Communication means sharing information, it can be local or distant. Telecommunication means communication at a distance. Data Communication is the exchange of information between devices via some type of transmission medium like a wire cable. The potency of Information Communication system depends on three essential features:. 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 data in a timely manner. It is useless if the information is transmitted and delivered late to the destination systems.
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Data Communication deals with the five network elements mentioned below: Message: The message is the data or the info to be transmitted or communicated form source system to the destination system. This message may be in graphic form, audio type, text form or a combination of these. Sender: The sender is the device or source system that sends the message. It can be a work station, a computer, phone etc. Receiver: The receiver is the destination system or device that 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 route where a message travels from sender device to the receiver device or from source system to the destination system. Protocol: A protocol is set of regulations and rules that regulate the data communication. It signifies the destination system that’ll convey as well as a link establishment involving the source systems. 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). This code uses 7-bits for every symbol to represent it. 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. UNICODE: This Unicode was designed to comprehend different languages since in the past codes that were developed understood just 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 the International Organization for Standardization, they designed a code using a 32 bit pattern. Pictures and numbers use bit patterns; also, a picture is divided into pixels.