Communication Systems and Networking.

 Communication Systems and Networking

If Samia used a computer in Jag to exchange data with Vidita, then Vinita's computer would have to have some kind of connection with Samia's computer. Data communication system is the process of exchanging data between multiple computers connected by special means for data transfer. Computers connected in data communication can be located nearby or far away. Different types of media in beta communication systems between different computers located at remote locations; For example, telephone lines, microwave connections etc. are used. Data is transmitted using analog signals i.e. sine waves over telephone lines, optical fiber lines or microwave connections. Computer generated signals are also digital signals or wireless. For this it is necessary to convert digital signal to analog signal and analog signal to digital signal, therefore an electronic device called modem is used with computer. In the case of using computer in data communication system, one computer source, another computer destination, modem connected to two computers, two transmitters and receivers and a wired or wireless connection are used as transmission media. The following figure shows the data communication system using computer-