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AWS Lambda can be utilized to acquire files by downloading through the following steps:

1. Create a Lambda function in AWS and add the necessary permissions to access the internet.

2. Use a programming language of your choice (e.g. Python, Java, Node.js) to write the code that will download the file from the internet. You can use HTTP, HTTPS, or FTP protocols to download the file.

3. In your Lambda function, call the code to download the file using the appropriate parameters such as the URL of the file to be downloaded.

4. Once the file is downloaded, you can then process it according to your requirements. You can save the file in an S3 bucket, read it into memory, or pass it to another service for processing.

5. After processing the file, you can then trigger another Lambda function or perform any other task necessary.

Overall, AWS Lambda provides a flexible and scalable solution for acquiring files by downloading, and it can be easily integrated with other AWS services such as S3, EC2, and DynamoDB to create a complete data processing pipeline.