Question

'Multiplexing' is a

• A. Conventional voice telephone technology
• B. Improve transmission quality and reduce noise.
• C. Introduce noise and interface into the transmission
• D. Message travels in one direction

Hint:

Multiplexing is like having multiple lanes on a single highway. It doesn't change the cars, but it allows the highway (the transmission medium) to be used more efficiently, leading to better overall traffic flow (transmission quality).

Answer 1

The Correct Option is B

Step 1: Define Multiplexing. Multiplexing is a technique used in telecommunications and computer networks that combines multiple signals or data streams into a single, shared medium or channel. The primary goal is to use a scarce resource (like a single fiber optic cable) efficiently.

Step 2: Evaluate the options. \[\begin{array}{rl} \bullet & \text{(A) It is a technique *used* in telephone technology, but not the technology itself.} \\ \bullet & \text{(B) By allowing many signals to share one high-capacity, high-quality channel, multiplexing improves the overall efficiency and can improve transmission quality compared to using many separate, lower-quality channels. It is a key benefit.} \\ \bullet & \text{(C) This is the opposite of the goal.} \\ \bullet & \text{(D) This describes simplex communication, not multiplexing.} \\ \end{array}\]

Step 3: Conclude. Among the given choices, improving transmission quality (by enabling the efficient use of high-quality channels) is a key advantage and purpose of multiplexing.