Definition
Resilience in technology refers to a system's ability to withstand and recover from disruptions, maintaining acceptable levels of performance and availability. It encompasses proactive measures to prevent failures and reactive strategies to minimize impact when incidents occur. This capability ensures business continuity by allowing operations to continue even when faced with unexpected challenges. For instance, a resilient cloud architecture might employ redundant servers across multiple geographic regions to prevent downtime from a single data center outage. While often discussed alongside fault tolerance, resilience is broader, including the system's capacity to adapt and learn from failures to improve future performance. Understanding resilience is crucial for roles covered in certifications like CompTIA Security+ and AWS Certified Solutions Architect.