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

Server 2008 with SP2 is the same bits as Vista with SP2. It is available in both 32 and 64 bit versions.Server 2008 R2 is the same bits as Windows 7 x64. It only comes in the 64 bit versions.

Hi ,Inline to suggestions above , please find the link below http://technet.microsoft.com/en-us/library/dd335036(WS.10).aspx ( windows 2008 SP2 ) http://www.microsoft.com/windowsserver2008/en/us/r2-compare-features.aspx( windows 2008 R2 ) Further more if you need assistance on your question i would encourage you to post your query under IIS http://forums.iis.net

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