CompTIA A+ Core 1 (220-1101) — Question 523

A help desk technician has been tasked with installing an IP phone in a small office with an unmanaged switch. When connected to an RJ45 receptacle, the phone does not boot. Which of the following is the QUICKEST way to resolve this issue?

Answer options

• A. Upgrade the Ethernet cable to the latest specification.
• B. Replace the phone.
• C. Install a PoE injector.
• D. Change ports on the switch.

Correct answer: C

Explanation

The quickest solution is to install a PoE injector because unmanaged switches typically do not provide Power over Ethernet (PoE) to devices. Upgrading the Ethernet cable may not address the power issue, replacing the phone is unnecessary if the phone itself is functional, and merely changing ports on the switch won't supply power to the phone either.