Does Generating a Pre-Signed URL Using AWS SDK v3 Make a Network Request to AWS?

Hello AWS Community,

I'm currently using Rails application, along with AWS SDK version 3 to manage file uploads and access. I need to generate pre-signed URLs for accessing objects in my S3 bucket.

I understand that pre-signed URLs allow temporary access to objects without sharing credentials, but I am unclear about the process of generating these URLs. Specifically, I have the following questions:

1. Does the process of generating a pre-signed URL using the AWS SDK (v3) make a network request to AWS, or is it performed entirely on the client-side?
2. Are there any costs associated with generating pre-signed URLs?

From my understanding, the AWS SDK should generate the URL locally, but I want to confirm this. Additional insights on how asw sdk handles this process would be highly appreciated.

Additional Information: Rails Application: Using Active Storage for file uploads. AWS SDK Version: 3. Objective: Generate pre-signed URLs for secure and temporary access to S3 objects. References to official AWS documentation or other reliable sources would be helpful.

Thank you for your assistance!