Are you prepping for the Security+ exam? Do you know the differences between disaster recovery and redundancy. Some people think the two are the same, but they aren’t.
A Security+ test candidate recently asked me for clarification between the two. In response, I wrote three related blog posts:
You can read those posts for more complete explanations. However, here is a synopsis of each.
Disaster recovery is a part of an overall business continuity plan. Often, an organization will use a business impact analysis to identify the critical systems and components. Security personnel then develop disaster recovery strategies and disaster recovery plans to ensure these systems will stay operational during and after a disaster.
Redundancy adds duplication to critical systems and provides fault tolerance. If a critical component has a fault, the duplication provided by the redundancy allows the service to continue without interruption. In other words, a system with fault tolerance can suffer a fault, but tolerate it and continue to operate.
