what is the meaning of data communication
Data communications are the exchange of data between two devices via some form of transmission medium such as a wire cable. ... The effectiveness of a data communications system depends on four fundamental characteristics: delivery, accuracy, timeliness, and jitter.
what are the components of data communication
Data communication enables the movement of electronic or digital data between two or more devices independent of their current geographical position, transmission medium, or data contents. The important Elements of Data Communication are message, sender, receiver, transmission medium, and protocol.
explain different data flow directions
Simplex: In simplex mode, the communication is unidirectional, as on a one-way street.
Half-Duplex: In half-duplex mode, each station can both transmit and receive, but not at the same time
Full-Duplex: A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions.
explain what is network and the characters of network
A network is a set of devices (often referred to as nodes) connected by communication links. ... A network must be able to meet a certain number of criteria. The most important of these are performance, reliability, and security.