Automatically added network definition

Hello,
I recently moved to v8.302. I noticed that after this upgrade, some hosts are automatically added to network definitions.

Take a look at this line:

computername.mydomain.local 192.168.***.***
Microsoft Windows Vista SP0 or SP1, or Windows Server 2008, mac address: 00:00:00:00:00:00(Inventec)

Last changed at 2011-05-06, 12:54 by nnd.plx (127.0.0.1)

Does anyone know why and what module created this object?

Thanks
eclipse79