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# System prepended metadata

title: AWS Technical Essencials - Key Concepts

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# AWS Technical Essencials - Key Concepts

## Global Infrastructure
- Region
- Availability Zone
- Edge Location

## EC2
- AMI
- Lifecycle
- Instance Family
- Metadata
- UserData
- Purchasing Options
    - On-Demand
    - Reserved
    - Scheduled
    - Spot
    - Dedicated Instance
    - Dedicated Hosts

## VPC
- Subnet
    - Private
    - Public
- Security
    - Security Group
    - NACL
    - Key Pairs
- VPN Connectivity option

## S3
- Bucket
- Object
- Versioning
- Storage Class
    - S3 Standard
    - S3 Standard – IA
    - S3 Glacier

## EBS
- Lifecycle
- Volume Type: SSD/HDD
- Scope
- vs. Instance Storage	

## IAM
- Shared Responsibility Model
- Authentication
    - Management Console
    - AWS CLI or SDK API
- Group 
- User
- Policy
- Role
    - Instance Profile
    - assumeRole
    - STS
- CloudTrail

## RDS
- Backup
    - Automatic Backup
    - Manual Snapshot
- Cross-Region Snapshot
- Security
    - SSL
    - Encryption
- Multi-AZ Deployment
- Provisioned IOPS

## DynamoDB
- Primary Key: Partition Key
- Complex Primary Key: Partition Key + Sort Key
- Provisioned Throughput

## ELB
- Classic Load Balancer
- Application Load Balancer
- Network Load Balancer

## CloudWatch
- Auto Scaling
- Launch Configuration
- Auto Scaling Group
    - Min
    - Max
    - Desired

## Trusted Advisor
- Cost
- Security
- Fault Tolerance 
- Performance 
- Service Limit

