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A simulation-based performance evaluation of the wireless application protocol (WAP) transport layer protocol, which may be suitable for combat net radio (CNR), is presented. In the simulations, the wireless transaction protocol (WTP) layer that is the transport layer of WAP is modeled in detail according to WAP forum specifications. Wireless transport layer security (WTLS) layer is excluded in this paper. The user datagram (UDP) protocol is modeled for the bearer adaptation protocol of the transport layer of WAP. The wireless session protocol (WSP) layer is modeled with some basic features. The OPNET model of MIL-STD-188-220B standard is used for the bearer network of WAP. Some user profiles are constructed for the application layer. These profiles are modeled implicitly with source generators and/or explicitly by implementing their process model. These user profiles simulate FTP, HTTP and E-MAIL applications. The protocols are simulated on "OPNET modeler radio". Frequency hopping radios are assumed during the simulations.