AWS Overview

1.1 What is "Cloud Computing"?

Characteristics:

1. On-Demand
2. Broad Network Access
3. Resource Pooling
4. Rapid Elasticity
5. Measured Service

Service Models

1. Infrastructure as a Service
2. Software as a Service
3. Platform as a Service

1.2 Global Infrastructure - Part 1: Regions

1. https://www.infrastructure.aws/
2. Unlike other cloud providers, who define a region as a single data center, at AWS Regions consist of multiple Availability Zones (AZ) (typically 3),

1.3 Global Infrastructure - Part 1: Availability Zones

1. AZ give customers the ability to operate production applications and databases that are more highly available, fault tolerant, and scalable than would be possible from a single data center.
2. AWS maintains 66 AZ around the world and we continue to add at a fast pace.
3. Each AZ can be multiple data centers (typically 3), and at full scale can be hundreds of thousands of servers.
4. They are fully isolated partitions of the AWS Global Infrastructure.
5. With their own power infrastructure, the AZs are physically separated by a meaningful distance, many kilometers, from any other AZ, although all are within 100 km (60 miles of each other).

1.4 Global Infrastructure - Part 3: Edge Locations

1. When you want to deliver content to your end users, you can get the best performance by delivering that content from a server that is closest to them, a server that has the lowest latency. 
2. edge locations serve Amazon Web Services content delivery network, known as Amazon CloudFront.
3. They also serve the DNS service known as Amazon Route 53.

1.5 Scope of Services

1. Global - AWS IAM, CloudFront, Route53
2. Regional - DynamoDB, S3, ELB, VPC
3. Availability Zone - EBS, EC2, Subnets

1.6 Service Overview