How do Amazon EC2 Auto Scaling groups help achieve high availability for a web application?

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Sean Frenette · Accepted Answer

They automatically add or replace instances across multiple Availability Zones when the application needs it

Sean Frenette · Answer

They automatically add more instances across multiple AWS Regions based on global demand of the application

Sean Frenette · Answer

They enable the application's stalk: content to reside closer to end users

Sean Frenette · Answer

They are able to distribute incoming requests across a tier of web server instances

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