A 911 computer-aided dispatch app must keep running if a single datacenter in the region fails. Which Azure construct is designed for that in-region high availability need?
Select an answer to reveal the explanation.
Short Explanation
If one building in the region goes dark, availability zones are the other buildings still humming. That is in-region high availability for something as serious as 911 CAD. Spreadsheets and resource group names do not invent a second datacenter.
Full Explanation
Availability zones are physically separate datacenters within an Azure region, each with independent power, cooling, and networking. Spreading a critical 911 CAD workload across zones helps it survive a single datacenter outage inside the region. That is distinct from naming conventions or cost-estimation tools, which do not provide fault isolation.