Data Communication – The Lifeblood of Digital Networks

Data communication is vital to our ever-growing digital world. Understanding how different methods of data transmission function is essential for designing reliable and efficient networks. Different methods determine how data is transferred.

The hardware in a data communications circuit will use different techniques to efficiently transfer data. These include desmultiplexing and multiplexing. These are processes that combine or separate signals and send them as a single multi-channel signal. This increases bandwidth and reduces costs. Error detecting code and signal amplifiers also reduce data corruption from electromagnetic disturbances or other noise that may change bits of data as they travel over a communication channel.

Data communications also come with rules (protocol) that are followed by the computer systems that transmit and receive data. These rules ensure that the message is read and accepted without error.

The sender is the computer or device that creates and sends out the message, which could be in the form of numbers, text images, sound, or video. The receiver is the computer or device that receives the message which could be the same as the sender or different. The transmission medium is the physical route from the sender to the receiver. It could be a wired media such as twisted pair wire fiber optic cable, or wireless such as lasers, microwaves or radio waves.