VAGUE DEFINITIONS We will clarify

Data Communication System
For Data Communication to occur, the communicating devices must be a part of a
communication system made up of some specific kind of hardware and software
This type of a system is known as a

“DATA COMMUNICATION SYSTEM”

Effectiveness of Data Comm. System
Effectiveness depends upon three fundamental characteristics:

• Delivery
• Accuracy
• Timeliness (Better NEVER than LATE)

Example of the POSTAL MAIL