Isolated location within data center regions where public cloud services originate and operate.

Isolated location within data center regions where public cloud services originate and operate.

• A. Availability Zone
• B. Region-Based Segmentation
• C. NACLs
• D. Data Zone

Answer: (A)

An Availability Zone is a physically isolated location within a cloud region, designed with its own power, cooling, and networking. Public cloud services originate and operate across these zones, and a region contains multiple AZs that are connected by fast, low-latency networks. This isolation protects against data-center-level failures and enables high availability by letting you distribute resources across zones so a problem in one zone doesn’t bring everything down. The idea described—an isolated location inside a region where services run—matches this concept exactly. The other terms don’t describe this specific fault-domain isolation: NACLs are just subnet-level traffic filters, a generic “region-based segmentation” isn’t a standard cloud construct for isolated fault domains, and “data zone” isn’t a recognized term in this context.