A graphical user interface displays performance data related to a communication session between a first computing device and a second computing device. The graphical user interface comprises a first graphical element and a second graphical element. The first graphical element has a number of sections that represent respective physical portions of a connection between the first computing device and the second computing device. Each of the sections displays the performance data of a current session for that respective physical section. The second graphical element displays corresponding performance data for a predetermined number of previous sessions between the first computing device and the second computing device.