Which term describes the use of a single wire or channel to carry the information for several instruments?

Which term describes the use of a single wire or channel to carry the information for several instruments?

• A. Polling
• B. Multiplexing
• C. Scanning
• D. Duplexing

Answer: (B)

Sharing a single wire or channel among several instruments is multiplexing. This means multiple signals are combined for transmission over one medium and then separated back into their individual streams at the receiving end. It lets you use one line more efficiently, lowering wiring costs while still conveying data from all devices. Variants include time-division multiplexing, where each instrument gets a turn in a time slice, and frequency-division multiplexing, where each signal occupies its own frequency band. The other terms describe different data-collection or transmission methods: polling involves the system asking each instrument for data in turn; scanning is a sequential read of sensors; duplexing refers to two-way simultaneous communication.

Sharing a single wire or channel among several instruments is multiplexing. This means multiple signals are combined for transmission over one medium and then separated back into their individual streams at the receiving end. It lets you use one line more efficiently, lowering wiring costs while still conveying data from all devices. Variants include time-division multiplexing, where each instrument gets a turn in a time slice, and frequency-division multiplexing, where each signal occupies its own frequency band. The other terms describe different data-collection or transmission methods: polling involves the system asking each instrument for data in turn; scanning is a sequential read of sensors; duplexing refers to two-way simultaneous communication.