220-1201 Practice Question: A technician is installing a new VoIP phone for a…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Run a new power extension cord from the nearest outlet.

  Why it's wrong here

  Running a new power extension cord from the nearest outlet is an unprofessional and often non-compliant solution for a permanent installation. Extension cords are typically intended for temporary use and can create tripping hazards, clutter, and potential electrical code violations. This approach does not provide a clean, integrated power solution and fails to meet the standards for a stable, long-term deployment of network infrastructure.

• ✓

  Use a Power over Ethernet (PoE) injector between the wall jack and the phone.

  Why this is correct

  Using a Power over Ethernet (PoE) injector between the wall jack and the phone is the most appropriate solution. A PoE injector actively adds electrical power to the existing Ethernet cable, allowing the VoIP phone to receive both data and power over a single Cat6 cable. This eliminates the need for a separate power adapter at the phone's location, simplifying cabling, reducing clutter, and providing a clean, efficient power delivery method for the device.

• ✗

  Replace the Cat6 cable with a USB-C cable for power.

  Why it's wrong here

  Replacing the Cat6 cable with a USB-C cable for power is fundamentally incorrect for network connectivity. Cat6 cables are specifically designed for Ethernet data transmission, providing the necessary twisted pairs and shielding for network communication. USB-C is a versatile connector primarily used for power delivery and data transfer to peripherals, not for standard Ethernet networking, and would not provide the required network interface for the VoIP phone to function.

• ✗

  Install a wireless bridge to eliminate the cable.

  Why it's wrong here

  Installing a wireless bridge to eliminate the cable is an unsuitable solution for a VoIP phone. While a wireless bridge could provide network connectivity, the VoIP phone itself would still require a separate power source, meaning a power cable would still be necessary. Furthermore, wireless connections can introduce latency, jitter, and potential signal interference, which are detrimental to the quality and reliability of real-time voice communications over VoIP.

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