Networks, such as the Internet, have become the most important communication infrastructure of today’s society. It enables the worldwide users (individual, group, and organizational) to access and exchange remote information scattered over the world. Currently, due to the growing needs in telecommunications (Void, video-conference, Void, etc.) and the diversity of transported flows, the Internet network does not meet the requirements of the future integrated-service networks that carry multimedia data traffic with a high quality of service (QoS). The main drivers of this evolution are the continuous growth of the bandwidth requests, the promise of cost improvements, and finally the possibility of increasing profits by offering new services.