Microsoft Windows Server 2008 helps IT professionals to increase the flexibility of their server infrastructure while offering developers a more robust Web and applications platform for building connected applications and services. Powerful new management tools and security enhancements offer more control over your servers and network and provide advanced protection for your applications and data.
Windows Server 2008 Standard Edition
This edition of Windows Server 2008 provides key server functionality across most server roles and features. It includes both full and Server Core installation options.
Windows Server 2008 Enterprise Edition
This edition builds on Windows Server 2008 Standard Edition to provide greater scalability and availability, and adds enterprise technologies such as failover clustering and Active Directory Federation Services.
Windows Server 2008 Datacenter Edition
This edition offers the same functionality as Windows Server 2008 Enterprise Edition with support for additional memory and processors, and unlimited virtual image use rights.
Windows Web Server 2008
This edition is designed specifically for use as a Web and applications server. Other server roles are not available in this edition.
Windows Server 2008 for Itanium-based Systems
This edition is designed for use with Intel Itanium 64-bit processors to provide Web and applications server functionality on that platform. Other server roles and features may not be available.
To get a trial
http://www.microsoft.com/windowsserver2008/audsel.mspx
Windows Server 2008 Release Candidate Evaluation Software Released
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