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Question 470 - SAP-C02 discussion

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A company provides a centralized Amazon EC2 application hosted in a single shared VPC The centralized application must be accessible from client applications running in the VPCs of other business units The centralized application front end is configured with a Network Load Balancer (NLB) for scalability

Up to 10 business unit VPCs will need to be connected to the shared VPC Some ot the business unit VPC CIDR blocks overlap with the shared VPC and some overlap with each other Network connectivity to the centralized application in the shared VPC should be allowed from authorized business unit VPCs only

Which network configuration should a solutions architect use to provide connectivity from the client applications in the business unit VPCs to the centralized application in the shared VPC?

A.
Create an AWS Transit Gateway Attach the shared VPC and the authorized business unit VPCs to the transit gateway Create a single transit gateway route table and associate it with all of the attached VPCs Allow automatic propagation of routes from the attachments into the route table Configure VPC routing tables to send traffic to the transit gateway
Answers
A.
Create an AWS Transit Gateway Attach the shared VPC and the authorized business unit VPCs to the transit gateway Create a single transit gateway route table and associate it with all of the attached VPCs Allow automatic propagation of routes from the attachments into the route table Configure VPC routing tables to send traffic to the transit gateway
B.
Create a VPC endpoint service using the centralized application NLB and enable the option to require endpoint acceptance Create a VPC endpoint in each of the business unit VPCs using the service name of the endpoint service. Accept authorized endpoint requests from the endpoint service console.
Answers
B.
Create a VPC endpoint service using the centralized application NLB and enable the option to require endpoint acceptance Create a VPC endpoint in each of the business unit VPCs using the service name of the endpoint service. Accept authorized endpoint requests from the endpoint service console.
C.
Create a VPC peering connection from each business unit VPC to the shared VPC Accept the VPC peering connections from the shared VPC console Configure VPC routing tables to send traffic to the VPC peering connection
Answers
C.
Create a VPC peering connection from each business unit VPC to the shared VPC Accept the VPC peering connections from the shared VPC console Configure VPC routing tables to send traffic to the VPC peering connection
D.
Configure a virtual private gateway for the shared VPC and create customer gateways for each of the authorized business unit VPCs Establish a Site-to-Site VPN connection from the business unit VPCs to the shared VPC Configure VPC routing tables to send traffic to the VPN connection
Answers
D.
Configure a virtual private gateway for the shared VPC and create customer gateways for each of the authorized business unit VPCs Establish a Site-to-Site VPN connection from the business unit VPCs to the shared VPC Configure VPC routing tables to send traffic to the VPN connection
Suggested answer: B

Explanation:

Create VPC Endpoint Service:

In the shared VPC, create a VPC endpoint service using the Network Load Balancer (NLB) that fronts the centralized application.

Enable the option to require endpoint acceptance to control which business unit VPCs can connect to the service.

Set Up VPC Endpoints in Business Unit VPCs:

In each business unit VPC, create a VPC endpoint that points to the VPC endpoint service created in the shared VPC.

Use the service name of the endpoint service created in the shared VPC for configuration.

Accept Endpoint Requests:

From the VPC endpoint service console in the shared VPC, review and accept endpoint connection requests from authorized business unit VPCs. This ensures that only authorized VPCs can access the centralized application.

Configure Routing:

Update the route tables in each business unit VPC to direct traffic destined for the centralized application through the VPC endpoint.

This solution ensures secure, private connectivity between the business unit VPCs and the shared VPC, even if there are overlapping CIDR blocks. It leverages AWS PrivateLink and VPC endpoints to provide scalable and controlled access (AWS Documentation) (Amazon Web Services, Inc.).

asked 16/09/2024
nagalingam mk
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