How do you determine whether a fault is in the transmitter or the receiver in a bidirectional link?

How do you determine whether a fault is in the transmitter or the receiver in a bidirectional link?

• A. Swap ends or use loopback tests with known-good equipment to isolate the faulty side.
• B. Check the power supply only.
• C. Replace both transmitter and receiver.
• D. Test with a multimeter on the cable shield.

Answer: (A)