Page 28 - DCAP512_WAP_AND_WML

WAP & WML

Notes In the example,
 The WAP client interacts with two servers in the wireless network.
 The WAP proxy translates WAP requests to WWW requests thereby permitting the WAP
client to submit requests to the web server.
 The proxy also ciphers the responses from the web server into the compact binary format
understood by the client.
 If the web server offers WAP content, the WAP proxy retrieves it directly from the web
server.
 However, if the web server provides WWW content (such as HTML), a filter is used to
translate the WWW content into the WAP content. For example, the HTML filter would
translate HTML into WML.

 The Wireless Telephony Application (WTA) server is an example origin or gateway server
that responds to requests from the WAP client directly. The WTA server is used to provide
WAP access to features of the wireless network provider’s telecommunications
infrastructure.
Examples of WAP use

 Checking train table information
 Ticket purchase

 Flight check in
 Viewing traffic information
 Checking weather conditions

 Looking up stock values
 Looking up phone numbers
 Looking up addresses

 Looking up sport results

Task What is the WTA server? What is it used for?

Self Assessment

Fill in the blanks:

13. A filter is used to translate the ………………….. content into the WAP content.
14. The WTA server is used to provide WAP access to features of the wireless network provider’s
………………….. infrastructure.
15. If the web server offers WAP content, the WAP proxy retrieves it directly from the
…………………..

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