If you're using X-plugins to monitor a Windows host, identifying the NIC device name required by the sampler is tricky, as it is not documented. To get the Windows NIC device name of a Windows host, go to the Netprobe binary directory, there you will find the executable Netprobe file, commonly NetprobeNT. Run the "NetprobeNT.exe -if " via the command prompt and it should list the host's NIC devices.
Here's an example detailing the steps to get the NIC device name; Go to the Netprobe binary directory;
Open the command prompt from the NetprobeNT folder, Shift+right-click; Open command window here;
Run the command "NetprobeNT -if" or "NetprobeNT -ifconfig" and it will show you a list of NIC device names. The NIC device names are the lines that starts with \Device..
If it happens that no data NIC device names are listed, upgrade your Winpcap version and then restart your system, re-run the steps and it should give you the information.