Many research efforts in network traffic characterization conclude that network traffic is self-similar (i.e., fractal or bursty), and thus not amenable to the statistical-multiplexing techniques currently found in the Internet. In particular they claim that the heavy-tailed distributions of file size, packet interarrival, and transfer duration solely contribute to the self-similarity of aggregate network traffic. In contrast, we demonstrate that it is the TCP stack itself that induces much of the self-similar behavior even when aggregated application trafic should smooth out as more applications traffic are multiplexed.