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You are running a legacy application that has a hardcoded IP address in your application. How might you apply high availability to the instance running that application?
AAssign a public IP address to the EC2 instance, have a backup instance running. In the event of failure, move the Public IP from the primary instance to the backup instance.
BAssign an elastic IP address to the EC2 instance, have a backup instance running. In the event of failure, move the Elastic IP from the primary instance to the backup instance.
CUse ELB for load balancing and assign the IP address and use auto scaling to manage load
DEC2 instance cannot be configured with hardcoded IP address