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Data communication is essential to our ever-growing digital world. Understanding how different methods of data transmission work is crucial to creating reliable and efficient networks. Different methods determine how data is transferred.
To transfer data efficiently hardware in a communication circuit uses a variety of techniques such as multiplexing and demultiplexing, which are processes that combine and separate signals into single composite ones for transmission and then back into individual components. This increases bandwidth and reduces costs. Error-detection code and signal amplifiers can also limit data corruption from electric disturbances, or even momentary electrical noises that may change bits of data as they travel over a communication channel.
Data communications also have a set (protocol) of rules that are adhered to by both the computers of the sender as well as the receiver. These rules ensure that the message is read and accepted without error.
The sender can be a computer or other device that generates the message and transmits it. It could be in the form text, numbers, pictures and sounds, or videos. The receiver is the device or computer that receives the message which can be the same as the sender or different. The transmission medium is the physical pathway from the sender to the receiver. It could be a wired or wireless medium such as twisted pair wire, fiber optic cable or wireless like microwaves or radio waves.