Which term is a technique that ensures a redundant component can quickly take over the functionality after failure?

Which term is a technique that ensures a redundant component can quickly take over the functionality after failure?

• A. failover
• B. PDU
• C. backup power generator
• D. Honeypots

Answer: (A)

Failover is the mechanism that allows a redundant component to take over quickly when the primary fails. In high-availability setups, a primary system is paired with a standby. Health checks or heartbeat signals detect a fault, and workload is automatically shifted to the standby so services continue with minimal downtime. Once the failed component is repaired, you can switch back if desired. This automatic takeover is what keeps critical systems online despite failures. The other terms don’t describe this automatic continuity function. A PDU is about distributing power and doesn’t manage service failover. A backup power generator provides power during outages but doesn’t govern the switch between active and standby components. Honeypots are decoy systems used for detection, not for maintaining availability.

Failover is the mechanism that allows a redundant component to take over quickly when the primary fails. In high-availability setups, a primary system is paired with a standby. Health checks or heartbeat signals detect a fault, and workload is automatically shifted to the standby so services continue with minimal downtime. Once the failed component is repaired, you can switch back if desired. This automatic takeover is what keeps critical systems online despite failures.

The other terms don’t describe this automatic continuity function. A PDU is about distributing power and doesn’t manage service failover. A backup power generator provides power during outages but doesn’t govern the switch between active and standby components. Honeypots are decoy systems used for detection, not for maintaining availability.