In this work, a model of a corporate network has been developed, simulated and implemented using optimized network engineering tool technology in a simulation environment of 100m x 100m office network topology. We monitored delay traffic, used one dimensional multilevel wavelet de-noising technique to filter the possible cause of the network congestion and used ACF and FFT to validate the result of the de-noising after all the stages of decomposition and reconstruction processes. The result of the filtering process revealed that error in the data is de-noised successfully as the coefficient of ACF grows above zero and the energy rate in the FFT-spectrum increased.