Abstract: For the TCP network in the presence of highly variable network parameters and UDP flows, two nonlinear adaptive sliding mode control algorithms were presented. Because the upper bound of the system uncertainties could not easily be obtained, an adaptive sliding mode controller was presented based on the upper bound of the system uncertainties. However, the chattering could not be eliminated effectively with this algorithm because of the using of sign function. So, an adaptive sliding mode controller was presented to directly adapt the system uncertainties. Simulation results demonstrated that the adaptive sliding mode controller for the system uncertainties is superior to that for the upper bound, and the adaptive sliding mode controller for the upper bound is superior to PI controller.