Computer Networks
Computer Networks Introduction to Computer Networks 1. Data Communications Data Communication refers to the exchange of data (in the form of bits) between two or more devices (computers, mobile phones, etc.) using a transmission medium such as cables or wireless signals. It is successful only when the data sent is correctly received and understood by the receiver. Components of Data Communication There are five essential components involved in any data communication system: Component Description 1. Message The data or information to be communicated (text, audio, video, images, etc.) 2. Sender The device or person that initiates the message (e.g., computer, mobile phone) 3. Receiver The device or person that receives the message (e.g., another computer, printer) 4. Medium The physical path thr...