CompTIA: Advanced Security Practitioner (CASP) Exam Prep

Answer: D - Failover occurs when a system that is malfunctioning automatically switches processes to another system to continue operations.

Key Takeaway: Failover is the capability to switch over automatically to a redundant or standby computer server, system, or network. This happens when the main component fails or terminates abnormally. Failover happens without human intervention and generally without warning. Failover is an integral part of mission-critical systems that must be constantly available.