AWS IAM Fundamentals: Users, Roles, Policies & Least Privilege

Users vs. roles vs. groups, identity-based vs. resource-based policies, policy evaluation logic, and applying least privilege in practice.

EC2 Instance Types & Purchasing Options

Instance family naming (m6i, c7g, r6g), On-Demand vs. Reserved vs. Spot vs. Savings Plans, and picking the right combination for a real workload.

S3 Storage Classes & Lifecycle Policies

Standard, Intelligent-Tiering, Glacier and Deep Archive compared on cost/retrieval time, plus lifecycle rules that move and expire objects automatically.

VPC Networking: Subnets, Route Tables & Security Groups

CIDR planning, public vs. private subnets, route tables, internet/NAT gateways, security groups vs. NACLs, and a reference 2-tier VPC design.