A network system enables data communication between 2 or more devices. Communication links or channels connects these devices. This link or communication cannel can be of 2 types; point-to-point and multipoint connection. Both of these connections has their advantages and disadvantages and use cases.
Data communication systems enable transfer of data using one of the three transmission modes. Data communication systems has 4 fundamental characteristics; which are delivery, accuracy, timeliness and jitter.