Which of the following tape formats can be used to backup data systems in addition to its original intended audio uses? 

Answer options:

A. Digital Video Tape (DVT).
B. Digital Analog Tape (DAT).
C. Digital Voice Tape (DVT).
D. Digital Audio Tape (DAT).

D

Digital Audio Tape (DAT) can be used to backup data systems in addition to its original intended audio uses. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 70.