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N-Modular Redundancy (NMR) is a fault tolerance technique used in computer systems and networks to enhance reliability and availability. It operates by replicating critical components or processes N times, where N is an integer greater than one, and using a majority voting mechanism to determine the correct output. If one or more replicas fail or produce incorrect results, the system can still function correctly by relying on the outputs from the majority of the remaining replicas. This approach is commonly used in safety-critical applications, such as aerospace and automotive systems, to ensure continuous operation despite potential failures.

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