There is a network (RJ45) port in your office, recently it stopped working. There is no connectivity provided when you plugin to it. The cable and your NIC are known-good, you need to make sure the cable on the back-end of the port is connected but the wiring closet is a disaster. Which tool will assist with this?
Tone generator/probe will help you identify which cable runs to your office so you can see if it is connected. A loopback plug is for testing the NIC, which we already confirmed good. PING is an application/command used to test network connectivity, it won't help here. A cable tester would likely be the next tool used once we find our cable and confirm that it is connected.
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What is a tone generator/probe and how does it work?
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What exactly does a loopback plug test for?
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Why is a PING command not suitable for troubleshooting this issue?