Why wlan0 Link encap:ethernet?

[ByRus]

Hello together,

I have a Backtrack LiveDVD and it all works fine.
I tried a D-LINK DWL-G122 and a DIGITUS DN-700.. usb wlan stick.
I typed "ifconfig wlan0 up" OK.
Then "ifconfig" --> and there is wlan0 with Link encap:ETHERNET and some mac adress
and wmaster0 with Link encap: UNSPEC

What does this mean??I can`t find anything in airodump-ng but in Kismet i can...
Thanks for help

Greetings
Brani

[imported_cybrsnpr]

BT4 has a newer kernel that uses the mac80211 wireless driver. Go READ more about it, especially the paragraph titled "The master device wmaster0" and your question should be answered.