Which of the following is not a common method of multiplexing data?

A. Analytical multiplexing

B. Time-division multiplexing

C. Asynchronous time-division multiplexing

D. Frequency division multiplexing

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.

Source: Information Systems Audit and Control Association, Certified Information Systems Auditor 2002 review manual, Chapter 3: Technical Infrastructure and Operational Practices (page 114).