Which features contribute to logic fault tolerance in RPS/NANTeL?

Which features contribute to logic fault tolerance in RPS/NANTeL?

• A. Single-path software with no cross-checks.
• B. Removing redundancy to save space.
• C. Delayed fault reporting.
• D. Redundancy, diversity, and fault-detection mechanisms.

Answer: (D)

Logic fault tolerance is achieved by building multiple independent paths for decision making plus mechanisms to detect and respond to faults. Redundancy provides alternate channels for critical decisions so a fault in one path can’t derail the final output. Diversity reduces the chance that the same fault affects all paths by using different implementations or technologies for the redundant channels, so a fault in one path won’t appear in the others. Fault-detection mechanisms continuously monitor health and results—checking for discrepancies, timeouts, or degraded performance—and trigger safe modes, failover, or alerts when something is wrong. Together, redundancy, diversity, and fault-detection enable detection, isolation, and safe continuity or controlled shutdown in the presence of faults. The other approaches would create a single point of failure, waste resources by removing redundancy, or delay fault handling, all of which undermine fault tolerance.

Logic fault tolerance is achieved by building multiple independent paths for decision making plus mechanisms to detect and respond to faults. Redundancy provides alternate channels for critical decisions so a fault in one path can’t derail the final output. Diversity reduces the chance that the same fault affects all paths by using different implementations or technologies for the redundant channels, so a fault in one path won’t appear in the others. Fault-detection mechanisms continuously monitor health and results—checking for discrepancies, timeouts, or degraded performance—and trigger safe modes, failover, or alerts when something is wrong. Together, redundancy, diversity, and fault-detection enable detection, isolation, and safe continuity or controlled shutdown in the presence of faults. The other approaches would create a single point of failure, waste resources by removing redundancy, or delay fault handling, all of which undermine fault tolerance.