Explain how the complementary strategies of resistance, recognition, recovery and reinstatement may be used to provide system resilience.
What will be an ideal response?
System resilience reflects a system’s ability to maintain its critical services in the
face of adverse external events such as system failures or cyberattacks.
1. Resistance. Resistance is concerned with trapping an external event or
attack before it damages the system. Improving resistance leads to a more
resilient system as it reduces the number of possible events that can
compromise the system’s services.
2. Recognition. Recognition is concerned with recognising either that there has
been an adverse external event that may compromise the system or that the
system has already been damaged by such an event. Early recognition can
mean that sociotechnical approaches can be used to minimize the
consequences of the event or that recovery strategies can be immediately
invoked to restart the system’s essential services.
3. Recovery. Recovery is concerned with getting critical services back up and
running as quickly as possible. Contributes directly to resilience as it is
concerned with ensuring that critical services are maintained.
4. Reinstatement. Reinstatement is concerned with getting the system back to
its normal operating state after an adverse event or sequence of events. This
also contributes to resilience because it is often the case that critical services
may use less critical services and without these services, the system is less
efficient.
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