Prediction of a network time delay is presented and discussed. Moving average, exponential moving average and linear least square prediction methods are applied. The accuracy of prediction is estimated with mean absolute error. It is assumed that network time delay have no predefined distribution and can come from Poisson probability distribution family with given range of lambda. Two types of autocorrelation are considered: zero autocorrelation and exponential autocorrelation. The simulation of prediction is realized in Matlab. The results of simulation are visualized and presented.