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Amazon Web Services (AWS) is the world's most comprehensive and broadly adopted cloud platform, offering over 200 fully featured services from data centers globally. Whether you are running a simple static website or a massive distributed machine learning pipeline, AWS provides the infrastructure.
Before diving into specific services, you must understand the global infrastructure of AWS.
A Region is a physical location in the world where AWS has multiple data centers. Examples include us-east-1 (N. Virginia), eu-west-1 (Ireland), and ap-northeast-1 (Tokyo).
You should always choose a Region closest to your primary user base to minimize network latency.
Each Region consists of multiple, isolated, and physically separate AZs (usually 3 or more). An AZ consists of one or more discrete data centers with redundant power, networking, and connectivity. To build highly available applications, you deploy your resources across multiple AZs within the same Region. If a flood or fire destroys one data center, your application remains online.
When you create an AWS account, you log in as the Root User. The Root User has unrestricted access to everything, including billing.
Security Best Practice: You should never use the Root User for daily tasks. Instead, you should immediately navigate to the IAM service, create a new "Admin" User for yourself, enable Multi-Factor Authentication (MFA), and log out of the Root account permanently.
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