An appliance that receives a data file and returns a file identifier based on the signature of the file is an example of which of the following storage devices?

Tape is a sequential storage medium primarily used for backups and archives; it does not inherently use content addressing for file identification.

Network Attached Storage (NAS) provides file-level access over a network using traditional file paths and names, not content-based identifiers.

Virtual Tape Library (VTL) emulates tape libraries on disk storage for backup purposes and does not use content addressing for primary data storage or retrieval.

Content Addressable Storage (CAS) systems generate a unique identifier, often a hash or signature, for each file based on its content. This identifier then serves as the address for retrieving the file, making it ideal for immutable data and ensuring data integrity.