The data flow between devices in the network is the only accurate picture of real communication. The collection of data by an independent probe is not affected by the performance of network nodes, whose main function is communication and transmission of data. If we need to know what is really happening in our network, deployment of independent probes is necessity. Probes are processing data from passive splitters, which ensures the necessary authenticity. Data collection does not affect the functionality of the network as it is completely transparent to data.