MDT can be installed either on a file server, or on your own laptop, but in this scenario, I use a file server named MDT01. Deployment of Windows 11 21H2 is only supported using Windows ADK for Windows 11 21H2, that supports both Windows 10 21H2 and Windows 11 21H2, but in my testing I found it working well even on older version of Windows ADK, like the Windows ADK 2004.