Abstract: We describe a 3D computer network optimisation tool using network management data including one or more of: network device data including hardware identification data, interface data characterising one or more interfaces of a said network device, firmware identification data for a said network device, operating system identification data for a said network device; information flow data relating to information flow within the network including network device information flow load data and link bandwidth data/statistical information flow data; as well as environmental data for a network device such as temperature or power consumption data and/or physical network device location data. The tool also uses captured network data and sniffer data from communication links; and connectivity of the network devices.