Video Source # 2
Data Communication
Data communication is the exchange of information/data between two devices by using some transmission medium such as a cable or air. Communication is the sharing of information locally or remotely.
Components of Data Communication
Data communications system has five key elements / components
Message, Transmitter, Receiver, Medium, Protocol
Message
Message is the data / information to be communicated.
Text, numbers, pictures, audio, and video.
Transmitter / Source
Device that generates & sends the message. a transmitter Sender transforms the data in such a way that can be transmitted over a communication system.
●Computer. ●Mobile phone. ●Video camera.
Receiver
Device that receives the message & transforms the data in such a way that can be read by the destination device.
●Computer. ●Mobile phone. ●Video camera.
Transmission medium
Physical path between sender and receiver by which a message travels. ●Twisted-pair cable. ●Coaxial cable. ●fiber-optic cable. ●Radio waves.
Protocol
Protocol is a set of rules that govern data communications.
Devices connected by hardware will not communicate without any protocol.
●IP ●TCP ●HTTP
Video Source # 2