What is the difference between Windows Server 2008 R2 and Windows Server 2008 SP2? If I want to download and play with IIS 7 and .Net 4 and ASP.Net 4, which do I need?

Hi,For IIS, as I known, ASP.NET 4 not available now, may be ship around VS 2010.WS2K8 = IIS 7WS2K8 R2 = IIS 7.5I'm think WS2K8 SP2 may be support .NET 4.0, but for sure you should play on R2http://technet.microsoft.com/en-au/library/dd560629(WS.10).aspxFor other features, http://technet.microsoft.com/en-us/library/dd391932(WS.10).aspx Thana

Some more info and comparison of Editions http://www.asprangers.com/post/2012/06/14/Difference-between-Windows-Server-2008-and-Windows-Server-2008-R2-OS.aspx