Tvark is a network monitoring tool with a GUI front-end and is tied to a MySQL database. The GUI provides a view of traffic activity that can be seen from the machine/interface that Tvark is run on. What the end user sees is a list of source nodes on the left, destination nodes on the right, and lines drawn, left to right, showing traffic flow. Tvark runs in realtime, meaning the traffic is shown roughly as it happens with a small delay between it and the display being created.
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