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MRTG (Multi Router Traffic Grapher) is a tool that graphs router and other network device traffic by monitoring SNMP and creating visual images of the traffic passing through each interface. Key features: MRTG is free software licensed under the GNU GPL that works on Unix, Linux, Windows and Netware. The software can track traffic on network devices and show network managers the bandwidth hogs, chatty protocols and end users potentially tapping applications they shouldn't.

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