What does ASP.NET MVC internally use?

What does aspnet mvc internally use (for routing)?

Application, Session, V开发者_Python百科iewstate, Cookies, Cross Page Data, Context.Items, Profiles???????

I mean how can it maintain states w/o using any of the above techniques?

ASP.NET MVC routing uses none of the above. It maintains no state. Internally it uses a static dictionary to store the route definition but that's an implementation detail that you should not depend on for any reason as it might change in future versions.