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Answer: Establish subnets in each Zone, balance EC2 instances with Auto Scaling, and enable Multi-AZ for the DB instance.
The correct option is C. To make the application highly available, you need to distribute your resources across multiple Availability Zones. This includes configuring subnets in each Availability Zone and setting up the Auto Scaling group to distribute EC2 instances across these zones. Furthermore, enabling Multi-AZ deployment for the RDS DB instance ensures that it can automatically failover to a standby instance in another zone in case of an outage, thus providing high availability for the database.
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A business-critical application runs on EC2 instances with an Application Load Balancer, within an Auto Scaling group, accessing a single-zone RDS DB instance. To enhance availability, redesign the setup to span two Availability Zones. What configuration ensures high availability?
A
Create subnets in both Zones, distribute EC2 instances via Auto Scaling, and establish DB connections across networks.
B
Deploy subnets spanning both Zones, balance EC2 instances with Auto Scaling, and set up DB network connections across Zones.
C
Establish subnets in each Zone, balance EC2 instances with Auto Scaling, and enable Multi-AZ for the DB instance.
D
Configure a spanning subnet across Zones, distribute EC2 instances with Auto Scaling, and implement Multi-AZ for the DB instance.
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