Physically securing backup tapes from unauthorized access is obviously a security concern and is considered a function of the: 

Answer options:

A. Operations Security Domain.
B. Operations Security Domain Analysis.
C. Telecommunications and Network Security Domain.
D. Business Continuity Planning and Disater Recovery Planning.

A

Physically securing the tapes from unauthorized access is obviously a security concern and is considered a function of the Operations Security Domain. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 71.