A 911 computer-aided dispatch redesign must remain available if a single datacenter fails inside one metro cloud region. Which construct provides that failure-domain isolation?
Select an answer to reveal the explanation.
Short Explanation
Availability zones are like separate fireproof wings in the same metro campus—if one wing goes dark, the others can keep CAD alive. Spreading across AZs beats parking everything in one datacenter. Versioning files or thin clients will not save you from a building outage.
Full Explanation
Availability zones are physically separated facilities within a region designed so that a failure in one zone is unlikely to take down the others. Spreading critical 911 CAD components across zones improves resilience to single-datacenter loss. Object versioning and endpoint clients do not replace multi-AZ architecture for service continuity.