- Network set of devices(Nodes) connected by a communication links.
- Computer network collection of autonomous computers interconnected by a single technology
- Distributed system a collection of independent computers appears to its users as a single coherent system. e.g WWW
The effectiveness of a data communications system depends on four fundamental characteristics:
- delivery,
- accuracy,
- timeliness,
- and jitter.
Five components of data communication systems
- Message
- Sender
- Receiver
- Transmission medium — physical path by which message travels
- Protocol — set of rules that govern data communication
Data flow