AWS Certified Solutions Architect Associate Test 3

Explanation:
Regions and Availability Zones
Amazon EC2 is hosted in multiple locations world-wide. These locations are composed of regions andAvailability Zones. Each region is a separate geographic area. Each region has multiple, isolatedlocations known as Availability Zones. Amazon EC2 provides you the ability to place resources, suchas instances, and data in multiple locations. Resources aren't replicated across regions unless you doso specifically. http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availabilityzones.html#concepts-regions- availability-zones
$ aws ec2 describe-availability-zones --region us-east1
{
  "AvailabilityZones" :[
    {
      "State" : "available",
      "RegionName":"us-east-1",
      "Messages":[],
      "ZoneName":"us-east-1b"
    },
    {
      "State" : "available",
      "RegionName":"us-east-1",
      "Messages":[],
      "ZoneName":"us-east-1c"
    },
    {
      "State" : "available",
      "RegionName":"us-east-1",
      "Messages":[],
      "ZoneName":"us-east-1d"
    }
]
}