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Data Communication in Simple Terms

Communicating means sharing information, it may be remote or local. Telecommunication means communication at a distance. Data Communication is the exchange of data between devices via some form of transmission medium, for example 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.

Precision: The machine must deliver the message correctly on the destination System, if any information transmitting from one system to another system is changed or altered and the same uncorrected bits are received on the destination system then it is of no use to read the message.
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Timeliness: The message must deliver the information in a timely manner. Info transmitted and delivered late to the destination systems or receiver device are useless.
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Data Communication deals with the following the five network elements:

Message: The message is data or the information to be transmitted or communicated form source system to the address system. This message may be in graphic form, audio type, text form or a combination of these.

Sender: The sender is the source system or device which sends the message. It may be work station, a phone, a computer, or a phone among other things.

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 govern the data communication. It represents a link establishment which will convey between the source systems and the destination system. 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 the left of the 7 bits to form a pattern of 1 byte like for example 01111111.

UNICODE: This Unicode was developed to understand a variety of languages, since before developed codes only comprehended English. A coalition of hardware and software development is called Unicode. This is 16 bits and will represent up to 65536 symbols.

ISO: This is International Organization for Standardization, they designed a code a pattern of 32 bits. Images and numbers use bit patterns as well, an image is split into matrix of pixels.