IT Resilience and Redundancy
IT resilience and redundancy are key components of a robust business continuity and disaster recovery plan, ensuring that an organization's critical systems and infrastructure can continue to operate in the face of disruptions or failures. Resilience is achieved through proactive measures, such as regularly testing and updating systems, implementing strong security controls, and continuously monitoring performance. Redundancy involves creating redundant (duplicate) components, systems or resources that can take over in the event of a failure, thus minimizing downtime and ensuring that critical services remain available. This can include stand-by servers, redundant network connections, and duplicated data centers.
Complete Guide to IT Resilience and Redundancy
IT Resilience and Redundancy is a crucial part of Business Continuity and Disaster Recovery Planning.
What is IT Resilience and Redundancy?
It is the ability of an IT system to maintain service during an unexpected event or quickly recover to normal operations. Redundancy means having duplicate or multiple ways to ensure service continuity.
Why is it important?
It reduces downtime in the event of an outage, data loss or disruption. This can protect from financial loss, reputational damage, and other negative impacts.
How does it work?
Redundant systems can be in place at all times (i.e., mirrored servers) or can take over during an outage (i.e., backup power). Resilience can be built through redundant hardware, diverse data paths, and failover systems.
Exam Tips: Answering Questions on IT Resilience and Redundancy
1. Understand the difference: Redundancy isn’t resilience. Resilience accounts for redesign and reconfiguration to improve performance in unexpected events.
2. Know the types of redundancy: This includes hardware, data and site redundancy.
3. Understand the metrics: They are often used to measure resilience and redundancy like RTO (Recovery Time Objective) and RPO (Recovery Point Objective).
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