What are the types of Zhengzhou network server?

The English name of the server is "Server", which refers to the special computer that provides some services for clients in the network environment. The server is installed with network operating system (such as Windows 2000 server, Linux, Unix, etc.) And various server application system software (such as network service and e-mail service). The "client" here refers to the computer that has installed the operating system used by ordinary users, such as DOS and Windows 9x. The processing speed and system reliability of the server are far higher than those of ordinary computers, because the server usually works continuously in the network. Ordinary computers will crash, so restarting is very important, and data loss is limited to one computer. The server is completely different. Many important data are stored on the server, and many network services run on the server. Once the server fails, a large amount of data will be lost, which is difficult to estimate. In addition, the server provides functions such as proxy Internet access, security verification, e-mail service, etc., It will fail, leading to network paralysis, which indicates the requirement for server reliability.

There are many kinds of servers according to different classification standards.

　 1. By network size

According to the size of the network, servers are divided into workgroup servers, departmental servers, and enterprise servers. Workgroup level servers are used for small networks with dozens of networked computers or with low requirements for processing speed and system reliability. Their hardware configuration is relatively low and their reliability is not very high. Departmental servers are used for medium-sized networks with approximately 100 networked computers, medium processing speed, and system reliability. Their hardware configuration is relatively high and their reliability is at a medium level. Enterprise servers are used for large networks with hundreds of networked computers, the highest requirements for processing speed and data security, and the highest requirements for hardware configuration and system reliability. It should be noted that the boundaries between these three types of servers are not absolute, but rather rather vague. For example, the difference between workgroup level servers and department level servers is not obvious, and some are simply called "workgroup/department" servers.

2. Divided by buildings

According to the server structure, it can be divided into CISC architecture server and RISC architecture server. CISC architecture mainly refers to servers adopting Intel architecture technology, which is usually called "PC server"; RISC architecture servers refer to servers using non Intel architecture technologies, such as servers using RISC central processors, such as Power PC, Alpha, PA-RISC, and Sparc. The performance and price of RISC architecture servers are far higher than those of CISC architecture servers. In recent years, with the rapid development of computer technology, the technical gap between information architecture based servers and RISC based servers has been greatly reduced. Users tend to choose servers based on intelligent buildings, but RISC based servers still play a very important role in large and key applications.

3. Classification by purpose

According to the purpose of use, servers can be divided into general servers and special (or "function") servers, such as the real Bohai series function servers. The general server is not designed for specific services, but can provide various service functions. At present, most servers are general-purpose servers. A dedicated (or "functional") server is designed for one or more functions and is different from a general-purpose server in some ways. If the CD image server is used to store CD images, it needs to be equipped with a large capacity, high-speed hard disk and CD image software.

4. Divided by appearance

According to the appearance of servers, they can be divided into desktop servers and rack servers. Website construction Some desktop servers use a chassis that is roughly the same size as a vertical computer desktop, while others use a large capacity chassis. Like a huge cabinet, the rack server looks like a switch rather than a computer, with specifications of 1U (1U=1.75 inches), 2U, 4U, etc. This is a 1U rack server. Rack servers are installed in a standard 19 inch cabinet. Speaking of which, what kind of server should I buy? This problem cannot be generalized, but should be adapted to local conditions. If your network is a small network composed of dozens of computers, users will not access the server in a short time, so it is enough to spend 10000 to 20000 yuan or 20000 to 30000 yuan. If your network consists of hundreds or even thousands of computers, and users need frequently used servers, they need to purchase departmental or even more expensive enterprise servers at a price of 30000 to 50000 yuan or even 60000 to 80000 yuan.