The Infopath form services consists of four components that are responsible for rendering the .xsn file on the browsers:
1. ASP.NET modules :Return HTML to the browser.
2. Infopath form services HTTPHandlers:Forward requests from IIS to the Page generator.
3. Converter: Responsible for converting the .xsn file into .aspx pages.
4. Page generator:Communicates with internal data sources and is responsible for processing postback data from the browser and maintaining session states.