Which disaster recovery method enables systems to continue operating even if one of the components fails?

Which disaster recovery method enables systems to continue operating even if one of the components fails?

• A. Mirroring
• B. High availability
• C. Backups
• D. Load Balancing

Answer: (B)

High availability is a disaster recovery method designed to ensure that systems remain operational even in the event of a failure of one or more components. This is achieved through various redundancies and failover mechanisms that allow alternate resources to take over seamlessly without significant downtime. For instance, in a high-availability setup, if one server goes down, another server that is part of the same cluster can immediately take on the workload, thereby keeping services running smoothly. This is crucial for organizations that require constant access to their systems and cannot afford interruptions. In contrast, mirroring involves duplicating data in real-time to ensure data integrity but does not inherently guarantee operational continuity if a system component fails. Backups are used to restore data after a failure occurs but do not provide ongoing operations during such an incident. Load balancing distributes workloads across multiple servers to optimize resource use and avoid overloading a single component, but it does not specifically address system availability in the event of component failure in the same way that high availability does.

High availability is a disaster recovery method designed to ensure that systems remain operational even in the event of a failure of one or more components. This is achieved through various redundancies and failover mechanisms that allow alternate resources to take over seamlessly without significant downtime.

For instance, in a high-availability setup, if one server goes down, another server that is part of the same cluster can immediately take on the workload, thereby keeping services running smoothly. This is crucial for organizations that require constant access to their systems and cannot afford interruptions.

In contrast, mirroring involves duplicating data in real-time to ensure data integrity but does not inherently guarantee operational continuity if a system component fails. Backups are used to restore data after a failure occurs but do not provide ongoing operations during such an incident. Load balancing distributes workloads across multiple servers to optimize resource use and avoid overloading a single component, but it does not specifically address system availability in the event of component failure in the same way that high availability does.