No, All the app does is simulate HTTP client requests. It only installs onto Windows client machines (since it's a Windows app), but it doesn't know anything about the server you're pointing it to. Since you can control multiple client machines, from a single "master client", it means that you can really stress a webserver(s) if you want. Even a few old Pentium 200 machines is quite capable of saturing a 100 Mb/sec switched network I've found Cheers Ken ----- Original Message ----- From: "Chris W. Parker" <cparker at swatgear.com> To: <thelist at lists.evolt.org> Sent: Friday, August 29, 2003 2:13 AM Subject: RE: [thelist] Average Load Time Ken Schaefer <mailto:ken at adOpenStatic.com> on Thursday, August 28, 2003 4:54 AM said: > Do you want to test it under load? [snip] > MS Web Application Stress Tool Is this meant for sites served by IIS?