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This type of backup management provides a continuous on-line backup by using optical or tape "jukeboxes," similar to WORMs (Write Once, Read Many):
Correct Answer: A
Explanation/Reference: Explanation: Hierarchical Storage Management (HSM) provides a continuous on-line backup by using optical or tape "jukeboxes," similar to WORMs. It appears as an infinite disk to the system, and can be configured to provide the closest version of an available real-time backup. This is commonly employed in very large data retrieval systems. Incorrect Answers: B: Hierarchical Resource Management (HRM) is not a defined backup media technology. C: Hierarchical Access Management (HAM) is not a defined backup media technology. D: Hierarchical Instance Management (HIM) is not a defined backup media technology. References: Krutz, Ronald L. and Russell Dean Vines, The CISSP Prep Guide: Mastering the CISSP and ISSEP Exams, 2nd Edition, Wiley Publishing, Indianapolis, 2004, p. 71