Final answer:
A Time Domain Reflectometer (TDR) is the right tool to identify the distance to a break in a network cable, as it measures the time of a reflected signal to pinpoint the fault location.
Step-by-step explanation:
The troubleshooting tool that can be used to pinpoint the distance to a break in a network cable is a Time Domain Reflectometer (TDR). A TDR sends a signal down the cable and measures the time it takes for the signal to reflect from a break or imperfection in the cable. This allows it to calculate and display the distance to the fault. In contrast, a multimeter can be used for basic continuity checks, a protocol analyzer monitors and analyzes network traffic and a cable tester can verify that a cable is functioning correctly but may not provide distance information about faults.