PRTG Traffic Grapher makes usage monitoring for computer networks easy. Here is a list of the most important features:
Supported Data Acquisition Methods
PRTG Traffic Grapher is an easy to use Windows software for monitoring and classifying bandwidth usage. It provides system administrators with live readings and long-term usage trends for their network devices. The most common usage is bandwidth usage monitoring, but you can also monitor many other aspects of your network like memory and CPU utilizations.