Forward (Chuyển tiếp) & Redirect (điều hướng)

Forward : When request of brower send to Servlet, it can forward request to a page other or servlet orther. notice address of URL in brower user still is adress of page the first, but content of page is view page is forwarded. Page forward is page (or servlet) in application not outside. 

Redirect : When request of brower send to Servlet A, servlet A can redirect request to servlet other or page other and done reposibility of servlet A.  

Example:

Error Code Status