220-802 · Question #743
220-802 Question #743: Real Exam Question with Answer & Explanation
The correct answer is D: Loopback plug. The technician has already ruled out software configuration and the physical cable from the workstation to the wall jack. The next logical component to test is the workstation's NIC (Network Interface Card) itself. A loopback plug connects the transmit pins directly to the receiv
Question
Options
- AToner probe
- BMultimeter
- CTime domain reflectometer
- DLoopback plug
Explanation
The technician has already ruled out software configuration and the physical cable from the workstation to the wall jack. The next logical component to test is the workstation's NIC (Network Interface Card) itself. A loopback plug connects the transmit pins directly to the receive pins on the NIC port, allowing the technician to verify the NIC can send and receive signals. If the loopback test passes, the fault lies somewhere in the infrastructure (patch panel, switch port, or wall port wiring), not the workstation hardware. A toner probe traces cable runs, a multimeter measures voltage/resistance, and a TDR locates cable breaks - none of these are the next logical step when the NIC itself hasn't been tested yet.
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