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Before you deploy a single line of C#, you must decide WHERE it lives. Choosing the right AWS Geography is the foundation of High Availability (HA) and Disaster Recovery (DR).
A Region is a physical location in the world where AWS has multiple data centers. **Architect Hint:** Choose a region based on **Data Sovereignty laws** (e.g., GDPR requires data to stay in Europe) and **Latency** (choose the one closest to your users).
Each Region has multiple AZs. An AZ is one or more discrete data centers with redundant power and networking. **The Rule:** Never deploy your app to a single AZ. If a lightning strike or flood hits that data center, your app goes down. Always span your .NET fleet across at least 3 AZs for 99.99% uptime.
These are NOT data centers where you run compute. They are small 'Points of Presence' (PoPs) used by **CloudFront (CDN)** to cache your frontend assets closer to users. This is what makes your website feel 'instant' globally.
Q: "Does cost vary by region?"
Architect Answer: "YES. us-east-1 (N. Virginia) is usually the cheapest, while af-south-1 (Cape Town) or sa-east-1 (São Paulo) can be 20-50% more expensive. As an architect, you must balance cost against user latency. Use **AWS Pricing Calculator** before committing to a multi-region strategy."
Quizzes linked to this course—pass to earn certificates.
On this page
1. AWS Regions 2. Availability Zones (AZs) 3. Edge Locations 3. Architect Insight