Hi, all experts here.
I used builtwith.com to analyse a website's technology. Let's say "kornferry.com", it show two web servers are being used now. Apache 2.2 and IIS 6. How could they use two different web server to host website?
Also the framwork includes J2EE and PHP and ASP.NET, as far as I know, these frameworks are different technology for different platforms, why can they use a mix?