AWS Global Infrastructure: Regions and Availability Zones

Understanding AWS's global infrastructure is key to designing reliable applications. AWS has regions—geographic areas like US East (N. Virginia) and EU (Ireland). Each region has multiple Availability Zones, which are isolated data centers. When I design an application, I spread resources across multiple Availability Zones for high availability. If one zone fails, the others keep running. Picking the right region matters for latency, cost, and compliance. For beginners, start with the region closest to your users.