We developed a Python-based POX controller for its flexibility and the ability to exert precise control over the network. Network testing is conducted through Mininet network emulation.

When it appears that there isn't sufficient bandwidth to transmit a file through a specific network link (e.g. bottleneck between h4 and switch), we trigger the queue configuration at a switch and activate the POX controller. The controller then evaluates the source IP address of each incoming flow and assigns it to an appropriate queue. These queue configurations effectively limit packet transfers, mitigating the risk of potential bottleneck issues.