Which AWS service can be used to establish secure VPN connections?

The service that is specifically designed for establishing secure VPN connections is AWS VPN. AWS VPN enables you to create a secure and private connection between your on-premises network and your AWS environment. It uses industry-standard IPsec (Internet Protocol Security) to encrypt the data transmitted over the VPN connection, ensuring that your data remains secure as it travels between your network and AWS.

AWS VPN supports both site-to-site connections, where you connect entire networks to each other, and client-based connections, allowing individual users to connect securely to your AWS resources. This makes it a versatile option for organizations that need to ensure secure data transmission, whether it's for remote access or connecting branches of a company.

Other services like AWS Direct Connect, while they offer dedicated network connections to AWS, do not specifically handle VPN connectivity in the same secure manner. Amazon CloudFront and AWS Global Accelerator serve different purposes, focusing on content delivery and application optimization, respectively, and do not provide VPN functionality. Therefore, AWS VPN is the correct choice for establishing secure VPN connections.