Often, the person handling initial calls from users about problems (often called a customer support rep, or CSR) cannot issue ping commands from the user’s device. In some cases, talking users through typing the right commands and making the right clicks on their machines can be a problem. Or, the user just might not be available. As an alternative, using different ping commands from different routers can help isolate the problem.
For the exam, it helps to practice pinging from the routers, as discussed in the next several pages.
The problem with using ping commands from routers, instead of from the host that has the problem, is that no single router ping command can exactly replicate ...