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?
Implement cloud bursting to a secondary availability zone.
Vertically scale all virtual machines within the primary region.
Deploy resources across multiple availability zones within a single 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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