The Server Core installation option of Windows Server 2008 or Windows Server 2008 R2 provides the following benefits:
Reduced maintenance. Because the Server Core installation option installs only what is required to have a manageable server for the supported roles, less maintenance is required than on a full installation of Windows Server 2008.
Reduced attack surface. Because Server Core installations are minimal, there are fewer applications running on the server, which decreases the attack surface.
Reduced management. Because fewer applications and services are installed on a server running the Server Core installation, there is less to manage.
Less disk space required. A Server Core installation requires only about 3.5 gigabytes (GB) of disk space to install and approximately 3 GB for operations after the installation.
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