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Modelling of network communication in OPNET IT Guru environment
 Mazák, Andrej ; Škorpil, Vladislav (referee) ; Hošek, Jiří (advisor)
The aim of this work is to describe modeling of network communication with the given network performance and load. The selected model of network approaches the real network topology of a telecommunication operator that provides network services for the customers. We take a closer look on the functions of the significant network protocols EIGRP and BGP and we also will focus on their configuration on the selected network devices. Routing in the network will be analyzed in the individual project scenarios with a use of selected routing protocols. Routing policy will be enforced for a BGP protocol in a separate scenario with an aim to prefer a concrete routing path to the destination, which is a common case of traffic engineering. The issue of virtual private networks is also taken into a consideration in an individual scenario, where there is Firewall as a specific network device used for separation of networks of a different trustworthiness and a following introduction of IP tunneling for an encrypted communication among the selected network entities within the topology. Simulation of the network communication is aimed on the response of FTP service, time delay of Ethernet, throughput of backbone links and communication flow in the targeted scenarios. The output of this work deals with the analysis of the achieved results, comparison of graphs as well as evaluation of the determined simulation parameters.
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