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ISACA CISA: Disaster Recovery Priority to Restore Operating System First

Learn why restoring the operating system should be the top priority when recovering a data center at an alternative site after a disaster.

Table of Contents

Question

When a data center is attempting to restore computing facilities at an alternative site following a disaster, which of the following should be restored FIRST?

A. Operating system
B. Data backups
C. Decision support system
D. Applications

Answer

A. Operating system

Explanation

In a disaster recovery scenario, restoring the operating system (OS) at the alternative site should be the first priority. The OS forms the foundation upon which all other software and applications run. Without a functioning OS, data backups, decision support systems, and applications cannot be installed or operated.

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