Address Bar in SDN

Hi,

Everyone using this forum know that SDN is built using SAP EP 6.

When you are accessing SDN, the address bar(of the browser) clearly indicates where you are.

For example, the collobaration area will have a URL

https://www.sdn.sap.com/sdn/collaboration.sdn

the downloads area has the URL

https://www.sdn.sap.com/sdn/downloads.sdn.

My Question is,

In EP6 implementation in my company, the url always remains

http://domain:port/irj/servlet/prt/portal/prtroot/com.sap.portal.navigation.portallauncher.default

Why is it like that?

Can anyone tellme how this has been done in SDN? (The change of URL in address bar)

I appreciate your help.

Thanks and Regards,

K. Prasanna