Which disaster recovery technique helps remove single points of failure and ensures continuous operation?

• A. Log shipping
• B. Failover
• C. High availability
• D. Checklist testing

Answer: (C)

The technique of high availability is specifically designed to eliminate single points of failure within a system or infrastructure, ensuring that services remain operational even during certain failures. High availability involves building redundant systems, implementing failover mechanisms, and using clustering techniques, so that if one component fails, another can take over without significant disruption or downtime. This ensures that services are continuously available to users and applications, which is critical in environments where uptime is essential.

In contrast, log shipping is a method used primarily for maintaining copies of data across different environments, which can aid in disaster recovery but does not inherently ensure continuous operation during a failure. Failover does play a role in maintaining operations during a failure, but it often relies on pre-existing setups for redundancy, rather than being solely focused on high availability strategies. Checklist testing is a method used to verify disaster recovery plans but does not deal directly with system availability during failures.

Thus, high availability is the most relevant choice when it comes to addressing single points of failure and ensuring that operations continue seamlessly.