Data communication is the transfer of data from one location to another through the network. It 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 information that is transferred is typically represented as an electromagnetic signal, that can change in speed and amplitude.
In the field of data communication, the most difficult task is transferring information over long distances. Signals that travel over long conductors can be affected by noise or electrical distortion which can alter the original data.
Error detection is a crucial component of successful data communication. This is achieved by adding a variety of checksums to the data packets which constitute a transmission and then comparing the result to all packets arriving at the destination. If the sum is zero, there are no errors in the data transmission.
To ensure the accuracy and reliability of data transmission, it’s important to maintain a high speed of transmission. This can be achieved by ensuring that the data is transferred on a medium free from interference, or by sending redundant information to prevent the loss of data due to intermittent interruptions.
A reliable data communication system is essential for a myriad of applications, including traffic information chat services, file downloads, and Internet-based services. For instance, traffic data transmits real-time estimates of traffic to passengers and drivers in vehicles on roadways, which can assist them in making better informed decisions about their travel.