All the upper layers view WDP as one and the same protocol, which has several 'technical realizations' on top of other 'data bearers' such as SMS, USSD, etc. The bottom-most protocol in the suite, the Wireless Datagram Protocol (WDP), functions as an adaptation layer that makes every data network look a bit like UDP to the upper layers by providing unreliable transport of data with two 16-bit port numbers (origin and destination).

The Japanese i-mode system offered another major competing wireless data protocol. īefore the introduction of WAP, mobile service providers had limited opportunities to offer interactive data services, but needed interactivity to support Internet and Web applications such as email, stock prices, news and sports headlines. Almost all modern handset internet browsers now fully support HTML, so they do not need to use WAP markup for web page compatibility, and therefore, most are no longer able to render and display pages written in WML, WAP's markup language. Introduced in 1999, WAP achieved some popularity in the early 2000s, but by the 2010s it had been largely superseded by more modern standards. A WAP browser is a web browser for mobile devices such as mobile phones that use the protocol. Wireless Application Protocol ( WAP) is a technical standard for accessing information over a mobile wireless network. ( Learn how and when to remove this template message)

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