Data communication is the transfer of data between two points via a network. It can be a wired or wireless medium, like optical fibers, copper wires or a computer bus. The electromagnetic signal used to transmit information can differ in amplitude or speed.
In data communication the most difficult part is transmitting information over long distances. Signals travelling over long conductors are affected by electrical distortion or noise, which can corrupt the original data.
Error detection plays a vital part in ensuring that data communication is successful. This is accomplished by adding a checksum to the data packets in a transmission and comparating it with the totality of all individual packets after they reach their destination. If the sum is zero, there are no errors in the data transmission.
For accurate and reliable data transmission, it is vital to maintain a steady speed of transmission. This can be achieved either by making sure that data transfer occurs on a medium without interference or by sending redundant data to avoid loss due to interruptions that occur in the moment.
Data communication that is efficient is essential for numerous applications, including chat, traffic information downloads, file downloads and other internet-based services. For instance, traffic data communicates real-time estimations of traffic speed to passengers and drivers in vehicles on roads, which could help them to make more click to read more informed decisions about their trip.