Explicit URL Forwarding:
For example, http://b.com/ points to http://a.com/xxx/ (any directory). When you enter http://b.com/ in the browser’s address bar and press Enter, the address displayed in the browser’s address bar will automatically change from the original http://b.com/ to the actual target address http://a.com/xxx/.
Implicit URL Forwarding:
For example, as above, the address displayed in the browser’s address bar remains unchanged as http://b.com/, but the content actually accessed is from http://a.com/xxx/
