Practice Test Geeks(CWT) Certified Wireless Technician Practice Test
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Power over Ethernet (PoE) & Cabling Infrastructure Flashcards

7 cards from real CWT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What additional capability does LLDP-MED provide beyond standard PoE classification in a wireless deployment?

    Answer: It enables granular power negotiation beyond the standard class tiers

    LLDP-MED (Media Endpoint Discovery) allows PDs to request specific wattage values from PSEs at a finer granularity than the fixed PoE class levels provide.

  2. What does the 'perpetual PoE' feature on enterprise switches provide?

    Answer: Uninterrupted PoE power to ports during a switch reboot or firmware upgrade

    Perpetual PoE maintains power to connected PDs such as access points and IP phones even while the switch is reloading or upgrading firmware, preventing unnecessary downtime.

  3. When troubleshooting a PoE-powered access point that will not power on, what should the technician do FIRST?

    Answer: Verify the switch port is PoE-enabled and confirm available power budget

    Confirming the switch port has PoE enabled and that the switch power budget is not exhausted is the quickest first step before assuming hardware or cabling failure.

  4. What minimum AWG conductor size is standard in CAT5e/CAT6 cables and recommended for PoE+ installations?

    Answer: AWG 24

    AWG 24 is the standard conductor gauge in CAT5e and CAT6 cabling, providing sufficient cross-section to keep resistive losses within acceptable limits for PoE+ deployments.

  5. A technician measures 42V at a PoE access point when the PSE outputs 48V. What is the most likely cause?

    Answer: Excessive cable length or high cable resistance causing voltage drop

    Voltage drop across the cable (V = IR) reduces the voltage at the PD below the PSE output; longer cables or higher-resistance cabling amplifies this effect.

  6. Which UPS characteristic is most critical for protecting a PoE switch that powers mission-critical wireless access points?

    Answer: Automatic voltage regulation (AVR) with hot-swappable batteries

    AVR ensures clean, stable power to the PoE switch regardless of utility fluctuations, while hot-swappable batteries allow battery replacement without dropping power to connected APs.

  7. What is the IEEE 802.3bt Type 3 maximum power output at the PSE?

    Answer: 60 watts

    IEEE 802.3bt Type 3 delivers up to 60W at the PSE, positioned between the 30W PoE+ (Type 2) and 90W Type 4 tiers to support mid-range high-power devices.