Web Server- The Core of Network.

Web servers are computers that deliver (serves up) Web pages. Every Web server has an IP address and possibly a domain name. Today, SPOTO will introduce some basic knowledge you should master.

Generally refers to the server in the network, that is, a dedicated computer that provides users with centralized computing, information publishing, and other services in a network environment. It is a computer system that provides certain services to other computers in the network and can provide services externally through the network. Web server data management network server.

Classification of web servers

The network server is different from the ordinary PC, and its CPU, chipset, memory, disk system, network and other hardware aspects have more stability, security and performance advantages. There are also many different classification methods for the classification of web servers.

From the perspective of application scenarios and functions, the network server includes file servers such as Novell's NetWare; database servers such as Oracle, MySQL, PostgreSQL, Microsoft SQL Server, etc.; mail servers Sendmail, Postfix, Qmail, Microsoft Exchange, Lotus Domino, etc.; Web servers such as Apache, thttpd, Microsoft IIS, etc.; FTP servers such as Pureftpd, Proftpd, WU-ftpd, Serv-U, VSFTP, etc.; application servers such as Bea's WebLogic, JBoss, Sun's GlassFish; proxy server, Such as Squid cache and so on.

From the scale of classification, it can be divided into entry-level servers for office documents and print servers; workgroup-level servers for small-scale networks, providing Web and mail services to small and medium-sized enterprises; data centers for medium-sized enterprises, A departmental mid-range server for applications such as web sites; and high-end enterprise servers with powerful data processing capabilities for large networks.

From the server structure division, the tower server, also known as the desktop server, the most traditional architecture, with good scalability; rack server, usually installed in a standard 19-inch cabinet, 1U according to the height ( 1U=1.75 inch), 2U, 4U and 6U specifications; blade server for high-density, high-availability, low-cost server platforms for special application industries and high-density computer environments; rack-mounted servers for needs A scenario where many module components are installed in the server.

From the computer hardware type, it is a dedicated server, using a dedicated system for database and Internet services, a full set of software and hardware systems provided by professional companies; PC server, compatible with a variety of network operating systems and network applications, performance reaches mid-range RISC server level.

Web server market

The absolute mainstream of the network server market is x86 servers, which account for more than 90% of the market.

The x86 server is also known as the CISC (Complex Instruction Set) architecture server. It is based on the PC mainframe architecture and uses Intel or other processor chips compatible with the x86 instruction set. After many years of transformation, the x86 processor has a complete ecological chain. And mature technology base, the most commonly used are Lenovo's System x series servers, HP's Proliant series servers.

The mainframe has a certain irreplaceability

Except for x86 servers, all mainframes, minicomputers, and UNIX servers are collectively referred to as non-x86 servers. They use RISC (Reduced Instruction Set) or other processors, primarily UNIX and other proprietary operating systems.

The RISC reduced instruction set processor mainly includes IBM's POWER and PowerPC processors. The SPARC processor and the EPIC processor jointly developed by Sun and Fujitsu are mainly the Itanium processors developed by HP and Intel. RISC server is characterized by high price, closed system, strong performance and high stability. It is generally in an irreplaceable position in large enterprises such as finance, telecommunications and banking.

The concept of a web server is easily confused, unlike a web server, which refers to a computer for a website, and a web server refers to software such as Apache that runs on a computer to manage web page components and respond to web browsers. Requested program.

The network server is the core that carries the Internet communication. To a certain extent, there is no Internet without a network server.