SSCP · Question #1071
SSCP Question #1071: Real Exam Question with Answer & Explanation
The correct answer is C: Statistical multiplexing. Statistical multiplexing (also called statistical time-division multiplexing or stat-mux) dynamically allocates bandwidth on demand. Unlike fixed time-division multiplexing (TDM), which assigns dedicated time slots regardless of whether a channel has data, statistical multiplexin
Question
Which of the following is a method of multiplexing data where a communication channel is divided into an arbitrary number of variable bit-rate digital channels or data streams. This method allocates bandwidth dynamically to physical channels having information to transmit?
Options
- ATime-division multiplexing
- BAsynchronous time-division multiplexing
- CStatistical multiplexing
- DFrequency division multiplexing
Explanation
Statistical multiplexing (also called statistical time-division multiplexing or stat-mux) dynamically allocates bandwidth on demand. Unlike fixed time-division multiplexing (TDM), which assigns dedicated time slots regardless of whether a channel has data, statistical multiplexing only allocates bandwidth to channels that are actively transmitting. This results in more efficient use of the shared channel. Option A (TDM) uses fixed, pre-assigned time slots. Option B (Asynchronous TDM) improves on TDM but is less dynamic than statistical multiplexing. Option D (FDM) divides the channel by frequency, not time or demand.
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