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AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question

An operations engineer is deploying a CloudFormation template that launches an Auto Scaling group with 40 Linux instances across three Availability Zones. The VPC uses a single /24 CIDR block. Each private subnet currently has a /29 IPv4 CIDR. Stack creation fails with the message "Subnet does not have enough free IP addresses." Which action remediates the issue with the least operational effort and downtime?

  • Associate an IPv6 CIDR block with the VPC and configure the launch template to deploy IPv6-only instances in the current subnets.

  • Use the ModifySubnetAttribute API to convert each existing /29 subnet to a /26 CIDR and rerun the stack.

  • Add several additional /29 subnets in each Availability Zone and include all of them in the Auto Scaling group's subnet list.

  • Create a new /26 subnet in each Availability Zone from the unused portion of the VPC CIDR, update the Auto Scaling group to use these subnets, and then delete the /29 subnets.

AWS Certified CloudOps Engineer Associate SOA-C03
Deployment, Provisioning, and Automation
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