A Company Has a Multi-Tier Application That Runs Six Front-End

question 307

Multiple Choice

A company has a multi-tier application that runs six front-end web servers in an Amazon EC2 Auto Scaling group in a single Availability Zone behind an Application Load Balancer (ALB) . A solutions architect needs to modify the infrastructure to be highly available without modifying the application. Which architecture should the solutions architect choose that provides high availability?

• A) Create an Auto Scaling group that uses three instances across each of two Regions.
• B) Modify the Auto Scaling group to use three instances across each of two Availability Zones.
• C) Create an Auto Scaling template that can be used to quickly create more instances in another Region.
• D) Change the ALB in front of the Amazon EC2 instances in a round-robin configuration to balance traffic to the web tier.

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