Final answer:
In the context of data communication, a satellite is based on "line of sight." It relies on a clear line of sight between the satellite and the receiver, unlike other types of cables.
Step-by-step explanation:
In the context of data communication, a satellite is based on "line of sight." Unlike other types of cables such as coaxial cable, fiber-optic cable, and twisted pair wire, which transmit signals through physical cables, a satellite communication system relies on a clear line of sight between the satellite and the receiver.
For instance, most satellite-transmitted information is carried on microwaves, and a clear line of sight between transmitter and receiver is needed due to the short wavelengths involved. This is because microwaves, being at a high frequency, can carry more information per unit time.
So, the correct answer to the question is satellite.