AWS Global Infrastructure
- Regions — cluster of data centers (e.g., us-east-1, eu-west-3). Most services are region-scoped.
- Availability Zones (AZs) — usually 3 per region (min 3, max 6). Each AZ = one or more discrete data centers with redundant power/networking. Connected to each other with high-bandwidth, ultra-low latency links.
- Edge Locations / Points of Presence — 400+ globally. Used by CloudFront, Route 53, WAF.
- Global services (not region-scoped): IAM, Route 53, CloudFront, WAF.