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║ AWS CONCEPTS AT A GLANCE ║
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║ SERVICE ║ ONE-LINE DESCRIPTION ║
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║ Region ║ Geographic location of AWS servers ║
║ Availability Zone ║ Data center(s) within a Region ║
║ VPC ║ Your private network in AWS ║
║ Subnet ║ Section of your VPC ║
║ CIDR ║ IP address range notation ║
║ Route Table ║ Rules for where traffic goes ║
║ Internet Gateway ║ VPC's door to the internet ║
║ NAT Gateway ║ Private subnet's one-way internet exit║
║ Security Group ║ Firewall at instance level (stateful) ║
║ Network ACL ║ Firewall at subnet level (stateless) ║
║ EC2 ║ Virtual server in the cloud ║
║ AMI ║ Template image for EC2 servers ║
║ EBS ║ Block storage attached to EC2 ║
║ EFS ║ Shared file storage for multiple EC2 ║
║ S3 ║ Object storage for files/backups ║
║ IAM ║ Controls access to all AWS services ║
║ IAM User ║ A person with AWS credentials ║
║ IAM Role ║ Temporary permissions for services ║
║ IAM Policy ║ JSON defining what is allowed/denied ║
║ Load Balancer ║ Distributes traffic to multiple servers║
║ Auto Scaling ║ Automatically adds/removes servers ║
║ RDS ║ Managed relational database service ║
║ Route 53 ║ AWS DNS service ║
║ CloudWatch ║ Monitoring and alerting ║
║ CloudTrail ║ Audit log of all API calls ║
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