- KB 2554876 (http://support.microsoft.com/kb/2554876)
- Windows KB -IIS Configuration Changes KB 2708075 (http://support.microsoft.com/kb/2708075)
- Web Server (IIS) role
- Application Server role
- Microsoft .NET Framework version 4.5 Release Candidate (RC)
- SQL Server 2008 R2 SP1 Native Client
- Microsoft WCF Data Services 5.0
- Microsoft Information Protection and Control Client (MSIPC)
- Microsoft Sync Framework Runtime v1.0 SP1 (x64)
- Windows Management Framework 3.0 Release Candidate (RC) which includes Windows PowerShell 3.0
- Windows Identity Foundation (WIF) 1.0 and Microsoft Identity Extensions (previously named WIF 1.1)
- Windows Server AppFabric
- Cumulative Update Package 1 for Microsoft AppFabric 1.1 for Windows Server (KB 2671763)

Database Server Prerequisites:
- KB 2554876 (http://support.microsoft.com/kb/2554876)
- Windows KB -IIS Configuration Changes KB 2708075 (http://support.microsoft.com/kb/2708075)
- Microsoft .NET Framework version 4.5 Release Candidate (RC)
For more information :
http://technet.microsoft.com/en-us/library/cc262485(v=office.15)