1. A region is a cluster of Data Centers.
2. Most AWS services are region-scoped.
1. Comliance - if it needs to keep data within same region
2. Proximity - closer to the main user base
3. Available Service
4. Pricing
1. Each region has multiple AZ's (usually 3, min 3, max 6)
2. Each AZ has one or more discrete data centers.
3. Separate from each other, means isolated from disasters.
1. 400+ points of presence/edge locations, in 90+ cities across 40+ countries.
2. Like CDN, deliver content to end user with low latency.