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Data communication is the transmission of data using a network. This could be a wired medium such as optical fibers or copper wires, a wireless medium like microwaves or radio waves, or even a computer bus. The transferring information is typically represented by an electromagnetic signal which can differ in amplitude or speed.
The transmission of information over long distances is perhaps the most difficult component of data communication. Signals that travel over long conductors are affected by electrical distortion or noise which can alter the original data.
Error detection plays an essential role in successful data communication. This is done by adding a checksum code to the data packets that make up the transmission and then checking it against the sum of all the individual packets when they reach their destination. If the resultant sum is equal to zero, then there were no errors have occurred in the data transmission.
It is essential to maintain a high transmission rate for precise and reliable communication. This can be accomplished by ensuring that the data flows over a medium that is free of interference or by transmitting redundant information to avoid the loss of data due to intermittent interruptions.
Effective data communication is vital for many applications, such as chat, traffic information downloads, file downloads and other internet-based services. For instance, traffic data provides real-time estimates of traffic passengers and drivers in vehicles on roads, which will help them to make more informed decisions about their trip.