Data communication is the transmission of data using the network. It can be wireless or wired medium, such as optical fibers or copper wires or a computer network. The electromagnetic signal that is used to transfer information may differ in amplitude or speed.
The transmission of information over long distances is the most difficult aspect of data communication. Signals that travel over long conductors can be affected by noise or electrical distortion which could corrupt the original data.
Error detection plays an essential role in successful data communication. This is achieved by adding a checksum number the data packets which make up a transmission and checking it against the total of all the individual packets after they arrive at their destination. If the sum is zero, there are no errors in the data transmission.
To ensure the accuracy and reliability of data communication, it is necessary to keep a high transmission rate. This can be accomplished by ensuring the data transfers on a medium free from interference or by sending redundant data to avoid loss caused by momentary interruptions.
A reliable data communication system is essential for a variety of applications, such as traffic information, chat services, file downloads and Internet-based services. For instance, traffic information provides real-time estimates of traffic motorists and passengers in vehicles on roadways, which can assist them in making better informed decisions about their travel.