Applications deployed on Websphere application server can be accessed by the user through the HTTP URL and the context root for that particular application. then when and why people use a Apache / IBM HTTP server in between user and Websphere application server?
If HTTP server is used in between user and Websphere application server how the URL redirection happens?
The benefits to using IBM HTTP Server are primarily performance and security. This developerWorks answer is the best I've seen in response to the same question.