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After collecting the information it will send back the raw data encapsulated in an SNMP protocol. MRTG records this data in a log on the client along with previously recorded data for the device. The software then creates an HTML document from the logs, containing a list of graphs detailing traffic for the selected devices in the server.
PRTG (Paessler Router Traffic Grapher) is a network monitoring software developed by Paessler GmbH. It monitors system conditions like bandwidth usage or uptime and collect statistics from miscellaneous hosts such as switches, routers, servers, and other devices and applications.
Cacti allows a user to poll services at predetermined intervals and graph the resulting data. Through the use of Cacti plugins, it has been extended to encompass all of the FCAPS operational management categories. It is generally used to graph time-series data of metrics such as CPU load and network bandwidth utilization. [4]
Example graph produced by Munin showing memory usage. Munin is a free and open-source computer system monitoring, network monitoring, and infrastructure monitoring software application. [4] Munin is written in Perl and uses RRDtool to create graphs, [5] which are accessible over a web interface. Its emphasis is on plug and play capabilities.
Network performance could be measured using either active or passive techniques. Active techniques (e.g. Iperf) are more intrusive but are arguably more accurate.Passive techniques have less network overhead and hence can run in the background to be used to trigger network management actions.
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The software features algorithms designed to predict future network statistics. Auto Discovery The software automatically discovers hosts or network devices it is connected to. Agentless The product does not rely on a software agent that must run on hosts it is monitoring, so that data can be pushed back to a central server.
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