Guided Notes
Introduction to AWS
The core building blocks: compute, storage, and IAM.
AWS (Amazon Web Services) rents out computing infrastructure — servers, storage, databases — on demand, billed by usage instead of bought outright.
Three services show up in nearly every AWS architecture: EC2 (virtual servers), S3 (object storage for files), and IAM (Identity and Access Management, which controls who can do what).
The single most important AWS habit is the principle of least privilege: an IAM policy should grant exactly the permissions a service or person needs, never more — over-permissioned credentials are one of the most common cloud security incidents.