Redirecting URL

[KAMAL]

Hi all,
I have one doubt that how some web sites will rediect from one page
to another page with out displaying the redirecting pages in the url .

for example:
Redirecting from one page to another page we have to use
http://www.somesite.com/login/register.aspx
some other sites will use like this
http://www.somesite.com/login/dsf323assd
In second one there is no extension to redirect to another page, often it
redirects .I am just saying the example.
How the second format is used to redirect from one page to another page is
it possible in .net 2003. if yes pls help me in doing that.

Thanks in advance.

Regards,
kamal.