Maybe you’ve already set up a core server. Or you are thinking about it.
Anyway. An overview of the available features for each version of Windows Server 2008 R2 can be found here: http://blogs.dirteam.com/blogs/sanderberkouwer/archive/2010/02/03/server-core-roles-and-features-in-2008-r2.aspx
The table below shows the individual roles and features in fresh Server Core installations of Windows Server 2008 R2, Web (column 1), Standard (column 2), Enterprise (column 3) and Datacenter (column 4) edition. It also lists the Server Roles features in a fresh installation of the special-purpose Hyper-V server 2008 R2. (column 5):
**Server Roles and Features**
Active Directory Certificate Services
Many roles can be configured on a core server. Think about it before you install a new full blown server with GUI if you plan to virtualize it.