Deathentication / Disassociation Amok Mode
This is used to kick clients from an AP.
In this case I created a txt file with the AP MAC and used this as the blacklist.
echo 00:13:D4:09:32:60 > mdk3test.txt
mdk3 mon0 d -b mdk3test.txt -c 1 -s 250
This didn’t actually kick my client off as an aireplay attack with sufficient packets would have done, but it effectively stopped all communication between the AP and the client.
from – http://bactracktutorial.blogspot.sg/2011/12/mdk3-network-traffic-disruption.html