Data communication is the transfer of data between two points using networks. It can be wireless or wired medium, such as optical fibers, copper wires or a computer bus. The electromagnetic signal used to transfer data can differ in amplitude or speed.
In the field of data communications, the most difficult task is transferring information over long distances. Signals that travel over long conductors can be affected by electrical distortion or noise that can cause corruption of the original data.
Error detection is an essential aspect of a successful data communications. This is accomplished by adding a number of checksums to the data packets which compose a transmission and comparing the sum to all the packets at destination. If the sum equals zero, there are no errors in the data transmission.
It is important to maintain a high transmission rate to ensure an accurate and reliable transmission. This can be achieved either by ensuring that the data is transferred on a medium free of interference or by sending redundant data to avoid losses caused by intermittent interruptions.
Effective data communication is crucial for a myriad of applications, including traffic information chat services, file downloads, and Internet-based services. For instance, traffic information provides real-time estimates of traffic motorists and passengers on roadways, which can help them to make more informed decisions about their journey.