WAP WIRELESS COMMUNICATION

WAP, Wireless Application Protocol aims to provide Internet content and advanced telephony services to digital mobile phones, pagers and other wireless terminals. The protocol family works across different wireless network environments and makes web pages visible on low-resolution and low-bandwidth devices. WAP phones are "smart phones" allowing their users to respond to e-mail, access computer databases and to empower the phone to interact with Internet-based content and e-mail.
WAP specifies a Wireless application Environment and Wireless Protocols. The Wireless application environment (WAE) is based on WSP (Wireless Session Protocol) and WTP (Wireless Transaction Protocol).
The OSI Model for Wireless Communication

The basic construction of WAP architecture can be explained using the following model. The order of the independent levels – which are a hierarchy - has the advantage that the system is very flexible and can be scaled up or down. Because of the different levels – or stacks - this is called the "WAP Stack", which is divided into 5 different levels.
Application Layer: Wireless Application Environment (WAE).
Session Layer: Wireless Session Protocol (WSP).
Transaction Layer: Wireless Transaction Protocol (WTP).
Security Layer: Wireless Transport Layer Security (WTLS).
Transport Layer: Wireless Datagram Protocol (WDP).
http://www.protocols.com/pbook/wap.htm