AWS Certified Solutions Architect – Professional — Question 25

You are tasked with moving a legacy application from a virtual machine running inside your datacenter to an Amazon VPC. Unfortunately, this app requires access to a number of on-premises services and no one who configured the app still works for your company. Even worse there's no documentation for it.
What will allow the application running inside the VPC to reach back and access its internal dependencies without being reconfigured? (Choose three.)

Answer options

• A. An AWS Direct Connect link between the VPC and the network housing the internal services.
• B. An Internet Gateway to allow a VPN connection.
• C. An Elastic IP address on the VPC instance
• D. An IP address space that does not conflict with the one on-premises
• E. Entries in Amazon Route 53 that allow the Instance to resolve its dependencies' IP addresses
• F. A VM Import of the current virtual machine

Correct answer: A, D, E

Explanation

The correct answers A, D, and E enable the legacy application to connect to its on-premises resources. A Direct Connect link ensures a private connection, while a non-conflicting IP address space avoids routing issues. Route 53 entries assist in resolving the dependencies' IP addresses. Options B, C, and F do not provide the necessary connectivity or resolution for the application’s dependencies.