EC2 : Public / Private Instances | Bastion Host | Web servers | Root volume increase | mounting a volume | Creating backup with (life cycle / AWS Backup) | Snapshot | Creating AMI | S3 mount | Security Group Configuration | monitoring with AWS inspector VPC : Subnets | Route tables | NAT | IG | Endpoint | Peering in same or different account / regions. IAM : User | Group | Roles | Getting cross account sign on with Roles | Attaching Identity Based policies | Resource based policies to S3 , cloud watch , backup , etc. S3 : Bucket Creation with multiple policies | only put | only list etc. | accessing through EC2 | 3rd party Agent | with AWS Agent mountpoint S3 | Making endpoint | Static Web hosting | CLI access | Encrypted with KMS. Load balancer : used ALB on apache2 | NLB to access private instance. CloudWatch : Monitered Memory & other utilization of EC2 | made SNS alarm alert. EBS : Modified volume of running instances | attached more volumes to existing instances.