The correct answer is A, C, and D. These steps will meet the requirements with the least operational overhead because:
•Step A will deploy an AWS Lambda function to the shared services account that can automate the network infrastructure provisioning in each member account by assuming a role with the necessary permissions.
•Step C will create an AWS CloudFormation template that describes the VPC and the transit gateway attachment for each account. This template can be uploaded as an AWS Service Catalog product to the shared services account, which can be used by the AWS Lambda function to create the network resources in each member account.
•Step D will deploy an Amazon EventBridge rule on a default event bus in the shared services account that can react to AWS Control Tower lifecycle events, such as creating a new managed account. This rule can invoke the AWS Lambda function to provision the network infrastructure in the new account.
The other steps are incorrect because:
•Step B will update the existing accounts with an Account Factory Customization (AFC), which is a feature of AWS Control Tower that allows you to customize the account creation process with AWS CloudFormation templates. However, this step will not automate the network infrastructure provisioning for the existing accounts, as it only applies to the new accounts created through the Account Factory. Moreover, this step will require additional operational overhead to maintain the AFC templates and products.
•Step E will create an AWSControlTowerBlueprintAccess role in the shared services account, which is a role that allows AWS Control Tower to access the AWS Service Catalog products in the shared services account. However, this step is not necessary for the automation solution, as the AWS Lambda function can access the AWS Service Catalog products directly without using this role.
•Step F will create an AWSControlTowerBlueprintAccess role in each member account, which is a role that allows AWS Control Tower to access the AWS Service Catalog products in the member accounts. However, this step is not necessary for the automation solution, as the AWS Lambda function can access the AWS Service Catalog products in the shared services account without using this role.
A company ran out of IP address space in one of the Availability Zones in an AWS Region that the company uses. The Availability Zone that is out of space is assigned the
10.10.1.0/24 CIDR block. The company manages its networking configurations in an AWS CloudFormation stack. The company's VPC is assigned the 10.10.0.0/16 CIDR
block and has available capacity in the 10.10.1.0/22 CIDR block.
How should a network specialist add more IP address space in the existing VPC with the LEAST operational overhead?
A.Update the AWS :: EC2 :: Subnet resource for the Availability Zone in the CloudFormation stack. Change the CidrBlock property to 10.10.1.0/22.
B.Update the AWS :: EC2 :: VPC resource in the CloudFormation stack. Change the CidrBlock property to 10.10.1.0/22.
C.Copy the CloudFormation stack. Set the AWS :: EC2 :: VPC resource CidrBlock property to 10.10.0.0/16. Set the AWS :: EC2 :: Subnet resource CidrBlock property to 10.10.1.0/22 for the Availability Zone.
D.Create a new AWS :: EC2 :: Subnet resource for the Availability Zone in the CloudFormation stack. Set the CidrBlock property to 10.10.2.0/24.
Answer: D
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