The invention relates to a method for the digital evaluation of a data transmission network comprising a plurality of nodes (1) and data transmission links (2) which extend between the nodes (1), each node comprising at least one input or output interface (11, 12) consisting of a plurality of queues which can each receive data in the form of analytical or event flows, said data flows being distributed into queues as a function of the service classes associated with the flow. The inventive method comprises the following steps consisting in: identifying the interfaces having a hybrid operating mode and each receiving at least one event data flow and at least one analytical data flow; and, for each interface having a hybrid operating mode, determining a virtual equivalent queue for the event data flows of a given service class (k) received by the interface, which is associated with the given service class (k), said virtual equivalent queue having an equivalent service rate (TRFE(k)), in order to evaluate the data transmission network by associating the virtual equivalent queue receiving the event data flows of the given service class (k) with the interface.