So what was the cause of you asking the question? Do you want to know
how many concurrent connects that Windows XP itself will handle as a
server host (http://support.microsoft.com/kb/314882/en-us)? Or did
you connect somewhere else that gave you the error message (something
like http://support.microsoft.com/kb/823189/en-us, or you visited a
site that limits the number of concurrent connections from the same IP
address which could be, for example, just 1 or 2)? You provided no
context for your question. Maybe you were asking about the max
connections allowed by default in Internet Explorer to somewhere else
(http://support.microsoft.com/kb/183110/en-us).