The thesis report provides broader information about IP and MPLS technologies and routing protocols. Internet architecture and problems in an IP networks are illustrated when different internet protocols are used. Small focus is provides on the demand oriented real time applications and data traffic for QoS parameters in IP and MPLS networks. Evaluation of QoS guarantee parameters such as delay, jitter and throughput are described with state of art study results mainly for real time applications in IP and MPLS networks. Finally MPLS TE implementation and working is described and proposed to achieve better network performance.

The aim of this semestral thesis is to create a MPLS network model using OPNET Modeler program and consecutive simulation of this network behavior with focus on quality of service assurance. This project contains also theoretical introduction to the MPLS network problematic and quality of service assurance - hereafter it is focused on simulation and analysis of data flows in extended communication network model with focus on Voice Over IP parameters. This thesis is discovering attributes of MPLS with respect to network traffc.