I am a new user, and new to the web domain,
As I know that Apache is a web-server, while Zend is an application server.
As I read in an article, that when the number of download requests increase and finally exceeds this number, the Apache server canít accept any more connections.
Zend Dowload Server takes over downloads and leaves the Apache server to handle online requests.
Please someone explain what is the main role of each one and what are the main differences between the two.