A company runs several business applications in three separate VPCs in us-east-1. The applications must communicate between VPCs and must consistently send hundreds of gigabytes of data each day to a latency-sensitive application in a single on-premises data center. Design a network connectivity solution that maximizes cost-effectiveness. Which solution meets these requirements?

The correct solution uses a single AWS Direct Connect connection for high-bandwidth, low-latency connectivity to AWS, which is essential for transferring hundreds of gigabytes daily to a latency-sensitive application. A Transit Gateway then centralizes routing, allowing all three VPCs to communicate with each other and the on-premises data center through this single Direct Connect connection. This maximizes cost-effectiveness by avoiding multiple Direct Connect connections and simplifying network management. Incorrect options: Multiple Site-to-Site VPN connections are less cost-effective and offer lower bandwidth and higher latency compared to Direct Connect, making them unsuitable for large, latency-sensitive data transfers. Third-party virtual network appliances introduce additional licensing costs, management overhead, and potential performance bottlenecks. Setting up three separate Direct Connect connections is significantly more expensive and complex than using a single Direct Connect with a Transit Gateway.