If the request is with extension aspx/asp, inetinfo.exe processes the request to API filter. ISAPI filter will
have several runtime modules called as ISAPI extensions. To process the request ISAPI filter takes the help of
these runtime modules. The runtime module loaded for ASP page is
asp.dll. And for ASP.NET page it's ASPNET_ISAPI.dll. From here the
request is processed to the "worker process". Worker Process will have
several application domains.
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