A Chief Information Officer wants a DR solution that runs only after a failure of...

Comprehensive and Detailed Explanation (aligned to N10-009):

A warm site is partially configured with necessary infrastructure and systems, but it requires recent backups to be restored before becoming fully operational. This provides a balance between cost and recovery time.

A. Cold site has only power and space, requiring full setup, which takes too long.

C. Active (active-active) runs simultaneously with the primary site, not only during failure.

D. Hot site is fully operational at all times and can take over immediately, but it’s more expensive.

References (CompTIA Network+ N10-009):

Domain: Network Infrastructure — Disaster recovery sites (cold, warm, hot, active).