Practice Exam - AWS Certified Advanced Networking Specialty

Based on the information provided, the correct approach to achieve load balancing across two different Direct Connect locations while meeting the 99.9% uptime target (as mandated in the use case) would be as follows:

1. Purchase another 10 Gbps Direct Connect dedicated connection from AWS. This is because, to guarantee an SLA of 99.9%, you must use dedicated Direct Connect connections rather than hosted connections.

2. Set up a new virtual interface (VIF) to the existing VPC in a different Direct Connect location. Each Direct Connect location provides a separate path into AWS, which can be used for load balancing and failover purposes.

3. Use BGP for load balancing between the two locations. By advertising the same routes from both locations with appropriate BGP community tags (e.g., 7224:7100 for low preference, 7224:7200 for medium preference, or 7224:7300 for high preference), you can influence the route selection on the return path back to your network based on the local preference.

4. Ensure that both Direct Connect locations terminate in the associated AWS Region where your workload is located. This is crucial for optimal performance and compliance with the use case requirements.

In summary, the correct option is:

Purchase another 10 Gbps Direct Connect dedicated connection from AWS in a different Direct Connect location that terminates in the associated AWS Region. Set up a new virtual interface (VIF) to the existing VPC and use BGP for load balancing.

This approach will help you meet the uptime target while also providing a resilient architecture with the ability to perform load balancing between two separate paths into AWS.