AWS Certified Advanced Networking – Specialty (ANS-C01) — Question 142

A team of infrastructure engineers wants to automate the deployment of Application Load Balancer (ALB) components by using the AWS Cloud Development Kit (AWS CDK). The CDK application must deploy an infrastructure stack that is reusable and consistent across multiple environments, AWS Regions, and AWS accounts.

The lead network architect on the project has already bootstrapped the target accounts. The lead network architect also has deployed core network components such as VPCs and Amazon Route 53 private hosted zones across the multiple environments and Regions. The infrastructure engineers must design the ALB components in the CDK application to use the existing core network components.

Which combination of steps will meet this requirement with the LEAST manual effort between environment deployments? (Choose two.)

Answer options

• A. Design the CDK application to read AWS CloudFormation parameters for the values that vary across environments and Regions. Reference these variables in the CDK stack for resources that require the variables.
• B. Design the CDK application to read environment variables that contain account and Region details at runtime. Use these variables as properties of the CDK stack. Use context methods in the CDK stack to retrieve variable values.
• C. Create a dedicated account for shared application services in the multi-account environment. Deploy a CDK pipeline to the dedicated account. Create stages in the pipeline that deploy the CDK application across different environments and Regions.
• D. Write a script that automates the deployment of the CDK application across multiple environments and Regions. Distribute the script to engineers who are working on the project.
• E. Use the CDK toolkit locally to deploy stacks to each environment and Region. Use the --context flag to pass in variables that the CDK application can reference at runtime.

Correct answer: B, C

Explanation

Option B is correct because it allows the CDK application to dynamically read environment variables, which minimizes manual input and enables seamless deployment across accounts and regions. Option C is also correct as it suggests using a dedicated account for shared services with a pipeline that automates deployments, further reducing manual effort. The other options involve more manual steps or do not provide the same level of automation and reusability.