The submitted thesis deals with important issues - performance aspects of computer networks. It is well known that the definition of network performance is a very complicated matter. Virtually no one-parameter term, which encompassed a system as a whole. Therefore, our work is specifically focused on levels of performance associated with the use of network operating systems like Linux. It is a modern operating systems providing a wide range of features, enabling network throughput, load balancing, network levels and other factors affecting the network Can this clustering. The level of these skills and other aspects are part of our work.