Add to ORKGIn this thesis we describe the problematic of QoS security for various services provided through IP network. These applications have high QoS parameter requirements such as delay, loss rate and variation of delay. We provide the required quality using different methods that are responsible for network monitoring and traffic management. One of the main QoS elements we deal with in this thesis are AC methods. These methods have the task of deciding whether they accept or reject a new connection based on its parameters without affecting the QoS of other connections. Furthermore, this thesis deals with the use of neural networks in AC methods. At the end two methods are simulated and compared: the Gauss method and the neural network utilization...