Active Directory Domain Services (AD DS) stores information about users, computers, and other devices on the network. AD DS helps administrators securely manage this information and facilitates resource sharing and collaboration between users. AD DS is also required to be installed on the network in order to install directory-enabled applications such as Microsoft Exchange Server and for applying other Windows Server technologies such as Group Policy.
Application Server provides a complete solution for hosting and managing high-performance distributed business applications. Integrated services, such as the .NET Framework, Web Server Support, Message Queuing, COM+, Windows Communication Foundation, and Failover Clustering support improve productivity throughout the application life cycle, from design and development through deployment and operations.
Dynamic Host Configuration Protocol Server
The Dynamic Host Configuration Protocol (DHCP) allows servers to assign, or lease, IP addresses to computers and other devices that are enabled as DHCP clients. Deploying DHCP servers on the network automatically provides computers and other TCP/IP based network devices with valid IP addresses and the additional configuration parameters these devices need./these are known as DHCP options, which allow them to connect to other network resources, such as DNS servers, WINS servers, and routers.
Domain Name System (DNS) provides a standard method for associating names with numeric Internet addresses. This lets users refer to network computers by using easy-to-remember names instead of a long series of numbers. Windows DNS services can be integrated with DHCP services, eliminating the need to add DNS records as computers are added to the network.
File Services provides technologies for storage management, file replication, distributed namespace management, fast file searching, and streamlined client access to files, such as UNIX-based client computers.
Print and Document Services
Print and Document Services enables you to centralize print server and network printer management tasks. With this role, you can also receive scanned documents from network scanners, and route the documents to a shared network resource, a Windows SharePoint Services site, or to e-mail addresses.
Remote Desktop Services
Remote Desktop Services provides technologies that enable users to access Windows-based programs that are installed on a remote desktop server, or to access the Windows desktop itself, from almost any computing device. Users can connect to a remote desktop server to run programs and to use network resources on that server.
Web Server (IIS)
The Web Server (IIS) role in Windows Server lets you share information with users on the Internet, an intranet, or an extranet. Windows Server delivers IIS, a unified Web platform that integrates IIS, ASP.NET, and Windows Communication Foundation.
Windows Deployment Services
You can use Windows Deployment Services to install and configure remotely Windows operating systems on computers that have Pre-boot Execution Environment (PXE) boot ROMs. Administration overhead is decreased through the implementation of the WdsMgmt Microsoft Management Console (MMC) snap-in that manages all aspects of Windows Deployment Services. Windows Deployment Services also provides end-users an experience consistent with Windows Setup.
Windows Server Update Services
Windows Server Update Services allows network administrators to specify the Microsoft updates that should be installed, to create separate groups of computers for different sets of updates, and to obtain reports on the compliance levels of the computers and on the updates that must be installed.