Which statement correctly differentiates hot standby from warm standby in a disaster recovery design?

Which statement correctly differentiates hot standby from warm standby in a disaster recovery design?

• A. Warm standby requires some startup or data synchronization before use.
• B. Hot standby is fully operational and ready immediately.
• C. Hot standby requires data synchronization before use.
• D. Hot standby uses different hardware.

Answer: (C)

In disaster recovery designs, the main idea is how ready the duplicate system is to take over and how current the data is at that moment. A hot standby is kept running and continuously synchronized with the primary, so it can take over immediately with no downtime and with up-to-date data. A warm standby is prepared to go online but isn’t fully running yet; it requires some startup work and a final data synchronization step before it can handle production traffic. The statement that hot standby requires data synchronization before use isn’t accurate because the whole point of hot standby is that synchronization is ongoing all the time, so no extra sync is needed at the moment of failover. Warm standby, on the other hand, relies on bringing the system online and completing synchronization before it can be used.

In disaster recovery designs, the main idea is how ready the duplicate system is to take over and how current the data is at that moment. A hot standby is kept running and continuously synchronized with the primary, so it can take over immediately with no downtime and with up-to-date data. A warm standby is prepared to go online but isn’t fully running yet; it requires some startup work and a final data synchronization step before it can handle production traffic.

The statement that hot standby requires data synchronization before use isn’t accurate because the whole point of hot standby is that synchronization is ongoing all the time, so no extra sync is needed at the moment of failover. Warm standby, on the other hand, relies on bringing the system online and completing synchronization before it can be used.