In a packet-based network like the Internet where everything is just data, the application is abstracted from the network. For example, a telephone network is not a network that just happens to carry voice, it is a network created to carry voice. Therefore, the network is the application. Anything that is not voice, such as dial-up modems, must be transformed to look like voice so the network can use it. But because not all data behaves like voice, this can be inefficient. »
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