Data Communication

Data communications refers to the transmission of digital data between two or more computers and a computer network or data network is a telecommunications network that allows computers to exchange data. The physical connection between networked computing devices is established using either cable media or wireless media. The best-known computer network is the Internet. A data communication system may collect data from remote locations through data transmission circuits, and then outputs processed results to remote locations. The di erent data communication techniques which are presently in widespread use evolved gradually either to improve the data communication techniques already existing or to replace the same with better options and features. Then, there are data communication jargons to contend with such as baud rate, modems, routers, LAN, WAN, TCP/IP, ISDN, during the selection of communication systems. The purpose of Data Communications is to provide the rules and regulations that allow computers with di erent disk operating systems, languages, cabling and locations to share resources. The rules and regulations are called protocols and standards in Data Communications. Hence, it becomes necessary to review and understand these terms and gradual development of data communication methods.