Answer - B.
In AWS, there are regions with each region separated in a separate geographic area.
Each region has multiple, isolated locations known as Availability Zones.
An availability zone is used to host resources in a specific region.
For more information on Regions and availability zone, please visit the URL:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html
The correct answer is B.
Explanation: An Availability Zone (AZ) is an isolated location within an AWS region, designed to be independent from other Availability Zones in terms of power, cooling, and network connectivity. Each availability zone is made up of one or more data centers, and they are located in separate and distinct geographic locations within a region. The primary purpose of Availability Zones is to provide high availability and fault tolerance by ensuring that applications and data are replicated across multiple AZs in the same region.
An Edge Location, on the other hand, is a site that is used by Amazon CloudFront to deliver cached content to end-users. Edge locations are located in different geographic locations around the world and are used to reduce latency by delivering content to end-users from the closest location. Each Edge Location is equipped with a caching server that is used to temporarily store copies of frequently accessed content.
In summary, Availability Zones are isolated locations designed to provide high availability and fault tolerance, while Edge Locations are used to deliver cached content to end-users from the closest location to reduce latency.
