A company needs a secure connection between its on-premises environment and AWS for a small amount of traffic. The connection does not require high bandwidth and must be established quickly. What is the MOST cost-effective method to set up this connection?

An AWS Site-to-Site VPN connection is the most cost-effective and quickest solution for a secure, low-bandwidth connection between an on-premises environment and AWS. It uses IPsec to establish encrypted tunnels over the public internet. Implementing a client VPN is incorrect because it's designed for individual users to access AWS resources, not for connecting entire on-premises networks. AWS Direct Connect provides a dedicated private connection, offering higher bandwidth and lower latency, but it's significantly more expensive and takes longer to provision, making it unsuitable for this scenario's requirements. A bastion host on Amazon EC2 is used for secure access to instances within a VPC, not for establishing a network-level connection between on-premises and AWS.