Then it presents the researches of protocols of WAP: WDP (Wireless Datagram Protocol), WTP (Wireless Transaction Protocol) and WSP (Wireless Session Protocol), and analyze their characteristics of performance.

• 其次着重研究了WAP其中的三层协议：WDP(Wireless Datagram Protocol)，WTP(Wireless Transaction Protocol)和WSP(Wireless Session Protocol)，并分析了它们性能和特点；