Domain 4.3: Migration Strategy — AWS SAP-C02 Practice Question 43

How to approach this question

Recognize that standard IP routing over Direct Connect handles hardcoded IPs, provided there is no CIDR overlap.

Full Answer

C.Configure the VPC route table to route the hardcoded IP addresses over the Direct Connect connection.✓ Correct

Use an Amazon Route 53 Resolver outbound endpoint to forward DNS queries, and use a NAT Gateway with a fixed Elastic IP if the mainframe requires IP whitelisting.

If the application uses hardcoded IP addresses for the on-premises mainframe, you simply need to ensure the VPC route table has a route for those IP addresses pointing to the Virtual Private Gateway (VGW) or Transit Gateway attached to the Direct Connect connection.

Common mistakes

Overcomplicating the solution with DNS or NAT when simple routing is sufficient.

A company is migrating a legacy application to AWS. The application uses hardcoded IP addresses to communicate with an on-premises mainframe. The mainframe cannot be updated to use DNS. How can the architect ensure the AWS application can communicate with the mainframe over AWS Direct Connect?

How to approach this question

Full Answer

Common mistakes

Practice the full AWS Solutions Architect Professional SAP-C02 Practice Exam 1

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