The client reported an application / server performance problem on the network.
Work on the RDP session was ok.
Before starting the analysis, a network audit was performed, the system and firmware of network cards were completely updated.
A log has been collected on the base where the problems occurred, it is clearly visible that it is the L2 / L3 layer.
After analyzing the logs of each device and application, errors were found.
After the entire process, the customer is satisfied with the solution to the problem.