Alabama Private Investigator Practice Exam

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What does CMDA stand for in mobile technology?

Code Division Multiple Access
Cell Division Multiple Access
Code Division Mobile Access
Cellular Division Multiple Access

The correct answer is: Code Division Multiple Access

CMDA stands for Code Division Multiple Access, which is a communication channel access method used by various radio communication technologies. The term highlights the technique of encoding multiple signals onto a single communication channel by using unique spreading codes. This allows multiple users to transmit information simultaneously over the same frequency without interference, making it a highly efficient method for mobile communications. In the context of mobile technology, CMDA is significant because it directly influences how mobile devices communicate with cell towers and each other. Its widespread use has contributed to the development and success of various mobile communication systems, especially in the United States. Other options provided refer to variations or adaptations of the core concept of multiplexing in different contexts but do not accurately represent the established terminology used within mobile communications. For instance, "Cell Division Multiple Access" or "Cellular Division Multiple Access" do not exist as recognized methods or standards in the field, while "Code Division Mobile Access" is not the correct phrasing, as it misrepresents the established acronym.