Every network - whether public or private - needs to be administered, regularly monitored and optimised. Some network tools will help you to recognise weak points in your network or simply to ensure that everything is operating as it should be.
With a Looking Glass you can execute basic operational commands on SWITCH routers, including ping, traceroute etc.
Traceroute determines the route of a packet from this SWITCH server to a Internet destination.
The theoretical network limitation could be calculated with the TCP Throughput Calculator.