Which AWS service is tailored for transferring data when bandwidth is limited?

AWS Snowball is specifically designed to facilitate the transfer of large amounts of data over physically constrained bandwidth situations. This service allows users to securely transport their data to and from AWS by using specially designed hardware devices. It helps overcome the limitations of traditional internet connections that may be too slow or unreliable to handle significant data transfers efficiently.

When using AWS Snowball, organizations can significantly reduce the time it takes to move large datasets to AWS, especially in scenarios where uploading via the internet would take impractically long. The devices themselves are rugged, secure, and equipped with encryption capabilities to protect data in transit.

In comparison, the other services listed do not focus on data transfer in a bandwidth-limited context. AWS EC2 is a service that provides virtual servers for computing power, AWS Lambda is used for running code in response to events without the need to manage servers, and AWS CloudFormation is a tool for provisioning and managing AWS resources through code but does not specialize in data transfer scenarios.