Data Transmission Data transmission is the process of conveying data between two points by way of a communication medium . Bounded media confine the data to specific physical pathways. Common examples of bounded media are wire and optical fiber cables. Cable TV uses bounded media.
Unbounded media transmit the data-carrying signal through space, independent of a cable.
Broadcast radio and television are examples of unbounded media. When practical, cable represents a low-cost and reliable means of transmitting data between computing devices. Practicality is a relative thing. Certainly cables are likely to be the logical choice within a building or even a building complex. It may not be possible, however, to run a cable between two buildings on different sides of a public road, and it is certainly a major undertaking when the buildings are located on different continents.