This feature/function can be handy from security point of view. Bink.Nu links to a functionality in Windows XP SP2 that limits conncurrent TCP/IP connections. I vaguely remember reading some relating when I was using Windows 2000 as well about a setting in registry where we can limit the number of TCP/IP Connections. On Googling I found the following link and on this forum . You can save your computer from P2P programs trying to make many connections at the same time and this can also apply to some of the viruses and worms.
Tejas Patel