: Blocking these domains can prevent legitimate updates and cloud-based features (like AutoCAD Web or shared views) from working. Security Risks
It speeds up AutoCAD. If you are an electrical engineer, AutoCAD doesn't need to parse the Architectural host file every time you insert a panel board. It just looks at MEP_Host.dwg . Autocad Block Host File
-INSERT *Furniture_Host.dwg
Having the file is useless if AutoCAD cannot find it. You must point AutoCAD to the folder containing your Block Host Files. This is done via the . : Blocking these domains can prevent legitimate updates