Learn data communication and its components, data representation, data transmission modes, and communication channels
CN 01: What is Data Communication? Data communications are the exchange of data between two devices via a transmission medium such as a wire cable or wireless media. For data communications to occur, the communicating devices must be part of a communication system made up of a combination of devices (physical equipment) and software (programs). The term telecommunication, which includes telephony, telegraphy, and television, refers to long-distance communication (tele is Greek for “far”). Fundamental characteristics of data communication The effectiveness
of a data communications system depends on 4 fundamental characteristics: 1. Delivery. The system must convey data to its intended destination. Data can only be received by the intended device or user. 2. Accuracy. The systems must transfer correct data. Data that has been altered during transmission and remains incorrect is unusable. 3. Timeliness. The system must deliver data in correct time. Data delivered late holds no value. Specifically for video and audio, this m…
