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Answer: Create a CloudFormation template; create a CloudFormation StackSet; deploy to all accounts.
CloudFormation StackSets allow deploying the same template (for VPC config) across multiple accounts and regions from a single admin account, with automatic synchronization for updates. This is far more efficient than manual, scripts, or per-account Lambdas.
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A company needs to create identical VPCs in 50 AWS accounts and keep them synchronized with future changes. What is the MOST operationally efficient method?
A
Create a CloudFormation template; sign into each account and create a stack manually.
B
Create a shell script using the AWS CLI with a list of accounts from a text file.
C
Create a Lambda function; store account info in DynamoDB; create the VPC in every account.
D
Create a CloudFormation template; create a CloudFormation StackSet; deploy to all accounts.
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