First, the Internet 3D network architecture
WAP (Wireless Communication Protocol) is an open global standard for communicating between digital mobile phones, Internet, or other personal digital assistants, computer applications, just like HTTP protocols, which specifies the interaction of web servers and customer browsers. The way, specification. Let us understand the WEB server before learning. Figure 1 (below) indicates that the client issues a request to the web server specified by the URL. The web server returns the corresponding content to the client based on the requesting program, and the two are interacting according to the HTTP protocol. When the client issues a URL request starting with HTTP, the web server-side program may be a CGI program, or a static web page, or a servlet program, or other server-side programs, but they all return the corresponding content in HTML format. In this way, customers can see the returned content on the browser.
Second, the Internet WAP network architecture
The WAP network architecture consists of three parts, namely WAP gateway, WAP mobile phone and WAP content server. These three aspects are not! The WAP gateway plays a 'translation' role of the protocol, which is a bridge that contacts GSM and the World Wide Web; WAP content server stores a lot of information to provide WAP mobile phone users to access, query, browse, etc. Figure 2 (Figure 2) shows the basic architecture of the WAP network. When the user typed the URL of the WAP content server he wants to access from the WAP phone, the signal passes through the wireless network, and the request to the WAP gateway is transmitted by the WAP protocol, and then translated ', then interact with the WAP content server in HTTP protocol, and finally The WAP gateway compresses the contents of the returned, processes the Binary stream to return to the customer's WAP phone screen. Programmaker wants to prepare a program or a WAP page on the WAP content server. Of course, to explain in detail is a long space, if you are interested, visit the WAP Forum.
