Data communication is the transfer of information from one place to another using a network. It could be a wired medium, such as optical fibers or copper wires or a wireless medium such as microwaves or radio waves, or even a computer network. The transferring information is typically represented as an electromagnetic signal which may vary in amplitude or speed.
The transmission of data over long distances is the most challenging part of data communications. This is due to the fact that signals passing through long conductors are susceptible to electrical distortion or noise that could alter the original data.
Error detection is an essential aspect of a successful data communications. This is achieved by adding a checksum number the data packets that comprise a transmission and checking it against the sum of all the individual packets as they reach their destination. If the sum is zero, there were no errors in the data transmission.
For reliable and accurate data transmission, it’s necessary to keep a high rate of transmission. This can be achieved by ensuring that the data is transferred on a medium that is free from interference or by sending redundant data to prevent the loss of data due to intermittent interruptions.
Efficient data communication is essential for a myriad of applications, such as traffic information chat services, file downloads and internet-based services. For instance, traffic data provides real-time estimates of traffic motorists and passengers on roads, which could aid them in making more informed decisions about their travel.