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Which concept refers to a system designed to operate continuously despite potential failures?

  1. Accessibility

  2. Redundancy

  3. Fault Tolerance

  4. High Availability

The correct answer is: Fault Tolerance

The concept that refers to a system designed to operate continuously despite potential failures is fault tolerance. This is achieved through various strategies and mechanisms that enable a system to continue functioning seamlessly even when a component fails. Fault tolerance involves integrating redundancy, such as duplicate components or systems, so that if one part fails, others can take over, ensuring continuous operation. While high availability also signifies a system's capacity to remain operational nearly all the time, it focuses more on minimizing downtime and maintaining service levels, rather than the specific mechanisms used to handle failures internally. Redundancy is a critical component of achieving fault tolerance, but it does not encompass the entire strategy of continuing operation in the face of failure. Accessibility relates more to the ability of users to access the system rather than the system's operational resilience in the face of failure. Understanding fault tolerance is essential in the context of cloud computing and IT infrastructure, as it directly contributes to system reliability and uninterrupted service delivery in various environments.