CompTIA Network+ (N10-007) — Question 122

Ann, a user, reports that her desktop phone is not working on one cable. However, that cable provides connectivity to her laptop. A technician determines PoE is not provided to the end device. Which of the following is MOST likely the cause?

Answer options

• A. Transceiver mismatch
• B. Crosstalk
• C. Jitter
• D. Open/short on the cable

Correct answer: A

Explanation

The correct answer is A, as a transceiver mismatch could prevent the desktop phone from receiving Power over Ethernet (PoE), while the laptop might not require PoE to function. The other options do not directly relate to the issue of PoE availability for the phone, making them less likely causes.