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