Which Android Enterprise device enrollment method requires little to no interaction with an end user's device from IT?

Zero-touch enrollment allows organizations to pre-configure devices with management policies before they even reach the end-user. When the user powers on the device for the first time and connects to the internet, it automatically provisions itself with the assigned policies, requiring no manual intervention from IT on the device itself. DPC (Device Policy Controller) is an app that runs on the device and enforces policies, but it doesn't describe an enrollment method that bypasses user interaction. QR Code and NFC are enrollment methods that require physical interaction with the device (scanning a QR code or tapping an NFC tag) to initiate the provisioning process, thus requiring more IT interaction than zero-touch.