Server operating system is divided into four schools: WINDOWS, LINUX, NETWARE, UNIX. WINDOWS OS major release WINNT 4.0 Server, Win2000 / AdvancedServer, Win2003 / AdvancedServer, WINDOWS SERVER 2008,, Windows server operating system to send the application, combined with .Net development environment for pro-business users, Microsoft provides a good application framework. For this type of computer operating system used to believe people are not unfamiliar, this is the world's largest software developer --Microsoft (Microsoft) developed. Microsoft's Windows system not only has an absolute advantage in the personal operating system, network operating system, it also has a very strong force. Such operating system configuration in the entire LAN configuration is the most common, but because of the higher its server hardware requirements, and stability is not very high, so Microsoft network operating systems are generally only used in middle and low server, high-end servers commonly used UNIX, LINUX or Solairs other non-Windows operating systems. In the LAN, Microsoft's network operating system are mainly: Windows NT 4.0 Server, Windows 2000 Server / Advance Server, as well as the latest Windows 2003 Server / Advance Server, etc., can be used either workstation system Windows or Windows operating systems, including personal Operating systems such as Windows 9x / ME / XP and so on. Throughout the Windows network operating system, the most successful thing is to forget that a system Windows NT4.0, it's almost become a small enterprise LAN standard operating system, it inherited a Windows family of unified interface, allowing users to learn, easier to use. Furthermore it features more powerful indeed, the network can basically meet the needs of all small and medium enterprises. Although compared to Windows 2000/2003 Server systems to be inferior in many functions, but its server hardware configuration requirements of many to be low, you can meet a greater extent in many medium and small business PC server configuration requirements. Linux operating system LINUX operating system, although similar to the UNIX operating system, but it is not a variant of the UNIX operating system. Torvald when you start writing kernel code to emulate from UNIX, almost all UNIX shell tools and can run on LINUX. This is a new network operating system, its biggest feature is the open source, freely available in many applications. Currently there are Chinese versions of Linux, such as REDHAT (Red Hat), Red Flag Linux. Users in the country has been fully recognized, mainly in its security and stability, it has many similarities to Unix. But the kind of operating system is now so still mainly used in high-end servers. Overall, support for specific computing environment so that each operating system has adapted to his workplace, which is the system support for specific computing environments. For example, Windows 2000 Professional for desktop computers, Linux is currently more suitable for small networks, UNIX and Windows 2000 Server, and is applicable to large-scale server applications. Therefore, different network applications, we need to have the purpose of selectively suitably network operating system. Shaanxi Telecom to build the most professional light, is the integrity of the IDC operators to provide all types of users dedicated server hosting, VPS and hire independent bandwidth, rack rental, Shaanxi Province is the only one with an ISP (Internet access service), IDC ( Internet Data Center) two-factor authentication IDC operators.