How IIS works??

When the client request for some information from a web server, request first reaches to HTTP.SYS of IIS. HTTP.SYS then send the request to particular Application Pool. Application Pool then forwards the request to worker process to load the ISAPI Extension which will create an HTTPRuntime Object to Process the request via HTTPModule and HTTP handler. After that, the ASP.NET Page LifeCycle events start.
This was a just overview of IIS Request Processing to let Beginner’s know how the request gets processed in the backend.

[srinubabu]

good explanation with pen and paper....thank u siri garu

[sureshmhc]

Good attempt. WAS is "Windows Process Activation Service" and NOT "Web Admin Services", otherwise good content.