Similarly, a double-click on any bar representing a flow redirects the user to the ‘Hosts Comparison’ page. Hosts can be pairwise compared in terms of Applications, Layer-4 Protocols, and Ports. A pie chart of exchanged traffic can be shown as well. Below is shown an Application comparison between two hosts. The diagram shows that both hosts on the left have used DNS services (on the right). It is also possible to visually spot behaviors and trends. For example it is possible to see that jake.unipi.it is much more prone to use Google’s DNS than the other host.