What is multiplexing and how is it used in telemetry?

• A. Separates multiple streams into individual channels.
• B. Encrypts all streams with a single key.
• C. Skips data to reduce bandwidth.
• D. Combines multiple data streams into one link.

Answer: (D)

Multiplexing in telemetry is the technique of sending several data streams over a single communication link. By combining those streams, all sensor and system data share one path, which makes better use of bandwidth and simplifies the transmission hardware. At the receiving end, a demultiplexer separates the combined data back into its individual streams so each subsystem gets the correct information.

This is why combining multiple data streams into one link is the best description. The other ideas don’t fit: separating streams describes demultiplexing, encryption is about security, and skipping data is about reducing volume rather than sharing a single channel.