What is Windows Server ?
Windows Server 2008 is the server operating system developed by Microsoft. It is considered the successor to Windows Server 2003 and boasts new features such as Server Core, an optional installation which allows administration completely via the command-line interface.
Windows Server 2008 is built from the same code base as Windows Vista; therefore, it shares much of the same architecture and functionality. Since the code base is common, it automatically comes with most of the technical, security, management and administrative features new to Windows Vista such as the rewritten networking stack (native IPv6, native wireless, speed and security improvements); improved image-based installation, deployment and recovery; improved diagnostics, monitoring, event logging and reporting tools; new security features such as BitLocker and ASLR (address space layout randomization); improved Windows Firewall with secure default configuration; .NET Framework 3.0 technologies, specifically Windows Communication Foundation, Microsoft Message Queuing and Windows Workflow Foundation; and the core kernel, memory and file system improvements. Processors and memory devices are modeled as Plug and Play devices, to allow hot-plugging of these devices. This allows the system resources to be partitioned dynamically using Dynamic Hardware Partitioning; each partition has its own memory, processor and I/O host bridge devices independent of other partitions.
The 4 main versions of Windows Server 2008 are different in the versions for 32 bit and 64 bit systems. For Itamium based computer systems (IA-64) Microsoft offers an optimized version as Web Server and Application Server. The functional range varies depending on variant and covers up to 17 server roles.
Windows Server 2008 Standard supports up to 4 GB RAM in the 32-bit version and 32 GB RAM in the 64-bit version. The operating system supports up to 4 processors. 12 server roles are complete supported, 4 partial and Active Directory Federation Services (ADFS) are not supported.
Windows Server 2008 Enterprise supports up to 64 GB RAM in the 32-bit version and 2 TB RAM in the 64-bit version. The operating system supports up to 8 processors. As field of application this server platform is recommended for the securing of business critical applications in Clusters. All server roles are supported.
Windows Server 2008 Datacenter supports up to 64 GB RAM in the 32-bit version and 2 TB RAM in the 64-bit version. The operating system supports depending on hardware up to 64 processors. As field of application this server platform is recommended for Computer Centres and Clusters. The replace of working memory and processors is possible without shutdown of the running operating system. All server roles are supported.
Windows Web Server 2008 supports up to 4 GB RAM in the 32-bit version and 32 GB RAM in the 64-bit version. As field of application this server platform is recommended for Web Server and supports only this server role.
- Server Core
- Active Directory roles
- Fail over Clustering
- Windows System Resource Manager
- Server Manager