Information about transfer speed on network adapters can be found in the section Presentation and Evaluation -> Presentation -> Online information -> Select a specific device using the upper filter.
Monitoring of data transfer speed on a specific PC can be also secured by watches, using the condition Internet IP traffic, which is described in more detail in the section Internet IP traffic [1].
Links
[1] https://www.customermonitor.eu/how-cm-works-0/monitoring-and-diagnostics/introduction-setting-online-monitoring-watches/overview#Internetiptraffic
[2] https://www.customermonitor.eu/sites/default/files/prenosove%20rychlosti_0.png