AWS Certified Advanced Networking – Specialty (ANS-C01) — Question 185

A company has an application that runs on premises. The application needs to communicate with an application that runs in a VPC on AWS. The communication between the applications must be encrypted and must use private IP addresses. The communication cannot travel across the public internet.

The company has established a 1 Gbps AWS Direct Connect connection between the on-premises location and AWS.

Which solution will meet the connectivity requirements with the LEAST operational overhead?

Answer options

• A. Configure a private VIF on the Direct Connect connection. Associate the private VIF with the VPC's virtual private gateway. Set up an AWS Site-to-Site VPN private IP VPN connection to the virtual private gateway.
• B. Create a transit gateway. Configure a transit VIF on the Direct Connect connection. Associate the transit VIF with a Direct Connect gateway. Associate the Direct Connect gateway with a new transit gateway. Set up an AWS Site-to-Site VPN private IP VPN connection to the transit gateway.
• C. Configure a public VIF on the Direct Connect connection. Associate the public VIF with a Direct Connect gateway. Associate the Direct Connect gateway with a new transit gateway. Set up an AWS Site-to-Site VPN private IP VPN connection to the transit gateway.
• D. Create a transit gateway. Configure a transit VIF on the Direct Connect connection. Associate the transit VIF with a Direct Connect gateway. Associate the Direct Connect gateway with a new transit gateway. Set up a third-party firewall in a new VPC that is attached to the transit gateway. Set up a VPN connection to the third-party firewall.

Correct answer: B

Explanation

Option B is the correct answer because it utilizes a transit gateway, which simplifies the network architecture and minimizes operational overhead by allowing for multiple connections while maintaining private IP address communication. The other options either introduce unnecessary complexity or do not meet the requirement of using a private IP address connection without involving public internet traffic.