Servers are divided into three groups:  mail servers, web servers and domain servers (DNS servers).

Mail server is a server which provides reception/transmission and routing of e-mails of Internet and Intranet users. Organization of mail server demands installation of special software.

Web server is a server which provides access to the information in the department of global connection. Web server stores and provides data into external network where data are organized as websites.

Also web server is responsible for customers’ query processing and fulfillment of  CGI-, JSP-, ASP-, PHP- along with the other applications.

Domain server is a special web server which provides the display of domain names in IP addresses and vice versa.