An administrator is designing a cloud deployment with a primary goal of ensuring service continuity in the event of an entire regional failure. Which of the following strategies BEST meets this requirement?
Deploy resources across multiple availability zones within a single region.
Implement cloud bursting to a secondary availability zone.
Deploy resources across multiple regions.
Vertically scale all virtual machines within the primary region.
Deploying resources across multiple, geographically separate regions is the most effective strategy for maintaining service availability during a complete regional outage. While deploying across multiple availability zones (AZs) within a single region protects against localized issues like a datacenter failure, it does not protect against a large-scale event affecting the entire region. Cloud bursting is a hybrid cloud strategy used to handle demand spikes by offloading workloads to a public cloud, not for regional disaster recovery. Vertical scaling increases the capacity of individual instances but does not improve fault tolerance against regional failures.
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What is the difference between a region and an availability zone in cloud computing?
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How does deploying across multiple regions ensure service continuity during a regional failure?