What is the difference between hot, warm, and cold sites in disaster recovery?

What is the difference between hot, warm, and cold sites in disaster recovery?

• A. Hot site is ready to operate immediately; warm site has equipment but requires setup; cold site provides space with minimal readiness.
• B. Hot site provides space with minimal readiness; warm site has equipment but requires setup; cold site is ready to operate immediately.
• C. Cold site provides space with minimal readiness; warm site has equipment but requires setup; hot site is ready to operate immediately.
• D. Warm site provides live production; hot site is for disaster drills; cold site is for development.

Answer: (C)

In disaster recovery, how ready a site is to take over depends on how much has already been prepared and how quickly you can restore operations. A hot site is fully equipped and connected to the production environment, with data replication in place, so you can switch over and operate with virtually no downtime. A warm site has the necessary hardware and connectivity but still needs some setup and data restoration, so the move to full operation takes more time than a hot site. A cold site provides only space and basic facilities, with no active hardware or data in place, so you must procure and install equipment and recover data before you can run again, making the recovery take the longest. The statement that aligns with these distinctions—cold site offers space with minimal readiness, warm site has equipment but requires setup, hot site is ready to operate immediately—fits the standard definitions.

In disaster recovery, how ready a site is to take over depends on how much has already been prepared and how quickly you can restore operations. A hot site is fully equipped and connected to the production environment, with data replication in place, so you can switch over and operate with virtually no downtime. A warm site has the necessary hardware and connectivity but still needs some setup and data restoration, so the move to full operation takes more time than a hot site. A cold site provides only space and basic facilities, with no active hardware or data in place, so you must procure and install equipment and recover data before you can run again, making the recovery take the longest. The statement that aligns with these distinctions—cold site offers space with minimal readiness, warm site has equipment but requires setup, hot site is ready to operate immediately—fits the standard definitions.