A specialized form of microwave transmission where the tower is in the sky.

• A. Microwave
• B. Satellite
• C. Coaxial Cable
• D. Host/Remote

Answer: (B)

The concept being tested is using a space-based relay to extend microwave communications. A satellite acts as a relay in orbit, receiving a microwave signal from a ground station (uplink), then re-transmitting it down to another ground station (downlink). This lets the signal travel long distances across the globe and over terrain that terrestrial towers can’t cover, because the “tower in the sky” is the satellite itself, not a physical tower on the ground.

Coaxial cable is a wired medium, not a sky-based transmission, so it doesn’t fit the idea of a tower in the sky. Host/Remote describes network roles rather than a transmission method. Microwave refers to the general frequency range, but the phrase specifically points to the satellite-based, space-relayed form of microwave transmission.