Net Activity Diagram 2.5.361 Release | 1,37 MB Net Activity Diagram is a Windows 95/98/2000/ME/XP/2003/Vista application that monitors your computer network and Internet activity.Net Activity Diagram. See Your Network Traffic.The program lets you monitor and control your network traffic. Visualizing your Internet activity is simple – the program is easy, even for inexperienced users. You can view all established connections, monitor network traffic over a certain period, setup various notifications, etc.