Which of the following is not a common method of multiplexing data?
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A. B. C. D.A.
Generally, the methods for multiplexing data include the following: Time-division multiplexing (TDM): information from each data channel is allocated bandwidth based on pre-assigned time slots, regardless of whether there is data to transmit.
Asynchronous time-division multiplexing (ATDM): information from data channels is allocated bandwidth as needed, via dynamically assigned time slots.
Frequency division multiplexing (FDM): information from each data channel is allocated bandwidth based on the signal frequency of the traffic.
Statistical multiplexing: Bandwidth is dynamically allocated to any data channels that have information to transmit.
Multiplexing is the technique used to combine multiple data signals for transmission over a single communication channel. This technique helps to increase the utilization of the channel and reduce costs. There are different methods of multiplexing data, including time-division multiplexing (TDM), frequency division multiplexing (FDM), and asynchronous time-division multiplexing (ATDM). Analytical multiplexing is not a commonly used method of multiplexing data.
A. Analytical Multiplexing:
Analytical multiplexing is a technique used to combine multiple data streams by allocating different time slots to each signal. This method uses a statistical model to predict the behavior of each signal and allocate time slots accordingly. Analytical multiplexing is not a common method of multiplexing data and is mainly used in research and experimental settings.
B. Time-Division Multiplexing:
Time-division multiplexing (TDM) is a technique used to combine multiple data streams by allocating each signal a specific time slot. In TDM, each signal is given a short time slot to transmit its data, and the channel switches between signals rapidly to transmit all the data. This method is commonly used in digital telephony and other digital communication systems.
C. Asynchronous Time-Division Multiplexing:
Asynchronous time-division multiplexing (ATDM) is a variation of TDM that allows for variable-length time slots. This method is used when the data rates of the signals being multiplexed vary significantly. ATDM is used in data communication systems and is also known as statistical time-division multiplexing (STDM).
D. Frequency Division Multiplexing:
Frequency division multiplexing (FDM) is a technique used to combine multiple data streams by allocating different frequency bands to each signal. In FDM, each signal is transmitted at a different frequency band, and the channel is divided into sub-channels to accommodate all the signals. This method is commonly used in analog radio and television broadcasting.
In conclusion, option A, analytical multiplexing, is not a commonly used method of multiplexing data. The commonly used methods are time-division multiplexing (TDM), frequency division multiplexing (FDM), and asynchronous time-division multiplexing (ATDM).