AWS Global Infrastructure Flashcards
What is a region?
A grouping of independently separated data centres in a specific geographic location known as “Availability Zones”
When in the console, can you see all resources at once, across multiple regions?
No, you can only view the resources in one region at a time but they will be across all availability zones in that region.
Are all AWS services region specific?
No, some services will work globally ie. across all regions. Eg. users created in IAM.
How do you switch between regions?
By selecting the region from the dropdown menu on the top right of the console.
Some AWS services have Global in the region drop down. What does this signify?
Some services are not region specific and work globally eg. IAM. The concept of regions therefore does not apply and you cannot select individual regions.
How is fault tolerance assured across Availability Zones?
Data centres within an AZ, have direct, low latency connections to each other but are although geographically close, are isolated from each other.
What comprises an Availability Zone (AZ)?
An AZ has multiple AWS Data Centres, the locations of which, are somewhat secretive for security purposes.
Well designed applications, utilise multiple Availability Zones in a region, why?
Fault tolerance and failover.
What is an Edge Location?
An AWS datacenter, which does not contain AWS Services but used to deliver content to parts of the world. Eg. CloudFront which is a CDN.
What are the benefits of an Edge Location?
Reduced space/time/latency required for requests from that part of the World.
What is a VPC and how does it related to AZ’s?
Virtual Private Cloud network. a VPC spans multiple AZ’s and Data Centers, allowing for high availability & fault tolerance.
