CISA Certified Information Systems Auditor – Question0886

Which of the following is a telecommunication device that translates data from digital to analog form and back to digital?

A. Multiplexer
B. Modem
C. Protocol converter
D. Concentrator

Correct Answer: B

Explanation:

Explanation: A modem is a device that translates data from digital form and then back to digital for communication over analog lines. Reference: Information Systems Audit and Control Association, Certified Information Systems Auditor 2002 review manual, Chapter 3: Technical Infrastructure and Operational Practices (page 114).