I got a bit confused on this point when 10 concurrent connections served more and faster over 60 seconds than 15 or 20 concurrent connections.<BR><BR>Now I would expect that concurrent connections are simply requests which come in at the same time. However, the requests per second was actually higher for the 10 connections than either the 15 or the 20 (with a declining trend as the connections went up).<BR><BR>So what exactly is a concurrent connection? Why does my IIS 4.0 box handle them notably less efficiently than requests spaced out by about a millisecond?<BR><BR>Thanks!