Explanation

AWS Direct Connect is the correct choice because:

• Dedicated Network Connection: AWS Direct Connect establishes a dedicated, private network connection between your on-premises infrastructure and AWS
• Consistent Performance: Provides consistent, predictable network performance since it bypasses the public internet
• Low Latency: Offers lower and more stable latency compared to internet-based connections
• Bandwidth Options: Available in various bandwidth options (1Gbps, 10Gbps, 100Gbps) to meet different requirements

Why not the other options:

• AWS Site-to-Site VPN: Uses the public internet, which can have variable performance and higher latency
• AWS Directory Service: Used for directory management (like Active Directory), not network connectivity
• AWS Transit Gateway: A network transit hub for connecting VPCs and on-premises networks, but still relies on other services (like Direct Connect or VPN) for the actual connection

AWS Direct Connect is specifically designed for scenarios requiring reliable, high-performance dedicated network connections between on-premises environments and AWS.