these are NetBIOS requests, netbios is very old and has been replaced
by dns and therefore can be disabled.

In order to disable NetBIOS over TCP/IP you should right-click on My
Network Places and select Properties. Then right-click on the Local
Area Connection icon, and select Properties. scroll down and click on
Internet Protocol (TCP/IP) and Properties. Now click Advanced, and
select the WINS tab. There you can disable NetBIOS over TCP/IP.

The only time that netbIOS needs to be left enabled is when there are
computers on your network running older microsoft operating systems
(anything before 2000, eg win 98, 95)

Flamer.