What does failover refer to in networking?

Failover in networking refers to a backup operational mode for redundant systems, providing reliability and availability during system failures or outages. In a failover configuration, when the primary system or component fails, the backup system or component automatically takes over to minimize downtime and ensure continuous service. This capability is crucial for critical applications and services, as it allows organizations to maintain operations without interruption, thereby enhancing overall system resilience.

The focus of failover is primarily on redundancy—having one or more backup systems that can seamlessly assume the workload of the primary system if it becomes unavailable. This can include arrangements such as having redundant servers, databases, or network paths, ensuring that there is always a backup ready to take over in case of a failure.

The other options describe concepts that do not align with the core purpose of failover. Enhancing network speed or increasing complexity does not specifically address the need for backup and continuity, while deleting unneeded systems contradicts the idea of maintaining redundancy for reliability.