During a risk assessment, the IT director emphasizes that the organization's public-facing web portal must stay online and reachable at all times, even when hardware components fail or maintenance is performed. Which term best describes this design goal of keeping the service operational and accessible whenever it is needed?
High availability refers to systems that are dependable enough to operate continuously with minimal downtime, often expressed as an annual uptime percentage such as 99.999%. Scalability focuses on expanding capacity, load balancing spreads traffic across multiple resources, and failover is the process of switching to a standby component when a failure occurs; none of those terms alone expresses the overarching requirement to remain operational and accessible at all times.
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What is high availability in more detail?
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How does high availability differ from failover?
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What technologies or practices ensure high availability?