How Traceroute Works and How to Read Its Output During an Outage
Users report that an internal application has gone slow, the server dashboards look normal, and the network group says nothing changed on their side. So where between the user and the application does the time actually go? Much of that answer comes from traceroute. The command lists every router a packet crosses on the way to its destination, with a timing figure set against each one. Arguments about ownership then come down to a single device on a single route.