Low-cost, online information publishing publicity and functional advantages, but its costs low is unthinkable. Radio and television advertising in seconds, but the cost of hundreds of thousands of newspaper advertising is also expensive, beyond the endurance of most of the individual units. Online information to save newspapers print and radio and television stations expensive production costs, the cost is greatly reduced, so the vast majority of individual units to be able to withstand. Cover a wide range of traditional media, regardless of TV, newspapers, radio or light box posters across geographical constraints, only the impact on specific areas. Turnover probability is high for traditional media advertising, the audience is mostly passive acceptance, difficult to produce the effect. The form of lively, the use of multimedia technology, various forms of online information, maps, text, sound, such as the shape of the product, use, use, price, purchase method of information displayed directly in front of the user. With real-time, businesses can change the advertising content at any time according to market needs, flexible and convenient. More importantly, corporate and institutional users, which is currently the most money, convenient and practical way. The Internet is now the United hundred million units of computers, these computers regardless of whether they are what models, running the operating system, what software to use, can be attributed to two main categories: client and server. The client machine to access the information of others. When you pass the post office or other ISP's dial-up Internet, your computer is temporarily assigned an IP address, use the temporary ID card, you can obtain information in the Internet ocean, when you break, you computer out of the IP address of the Internet has also been recovered. Server is to provide information for others to access the machine, usually referred to as the host. People at any time have access to it, so the host must at all times connected to the Internet has its own permanent IP address. To this end not only have to set up a dedicated computer hardware have to hire expensive dedicated data lines, plus various maintenance costs such as rent, labor, electricity, etc., and never is a good bear. To this end, developed a virtual mainframe technology. Virtual host, a host can be divided into many "virtual" host, each virtual host has a separate domain name and IP address with a complete Internet server. Completely independent of the virtual host, exactly the same as the outside, each virtual host and a separate host. The same effect, but the cost is not the same. Multiple virtual hosts to share the resources of a real host, each virtual host the user to bear the cost of hardware and network maintenance costs, the cost of communication lines are significantly reduced, the Internet truly become a network that everyone can afford! Currently, many companies create a site using this method, so that not only saves the purchase of machinery and leased-line costs, but also do not have to worry about technical issues for the use and maintenance of the server, without hiring a dedicated management staff.