Practice Test Geeks(CPL) Certified Professional Locksmith Practice Test
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Smart Lock & IoT Security Flashcards

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

Read the first 7 Smart Lock & IoT Security flashcards as text

  1. Which wireless protocol operates on the 908.42 MHz frequency band and is commonly used in smart locks to avoid Wi-Fi interference?

    Answer: Z-Wave

    Z-Wave operates at 908.42 MHz in North America, which avoids the crowded 2.4 GHz band used by Wi-Fi and Bluetooth.

  2. A customer's smart lock repeatedly disconnects from their home network. The locksmith checks and finds the lock is a Wi-Fi model placed 45 feet from the router with two walls in between. What is the most likely cause?

    Answer: Insufficient Wi-Fi signal strength at the lock location

    Wi-Fi signal degrades with distance and obstructions; 45 feet with two walls is often enough to cause unreliable connectivity for smart locks.

  3. What does the term 'mesh network' mean in the context of smart lock ecosystems like Z-Wave or Zigbee?

    Answer: Each device can relay signals from other devices, extending network range

    In a mesh network, each node (device) can act as a repeater, forwarding signals from other devices and extending the overall network range.

  4. Which authentication factor does a fingerprint biometric smart lock represent?

    Answer: Something you are

    Biometric identifiers like fingerprints represent the 'something you are' authentication factor because they are inherent to the individual.

  5. A locksmith is installing a smart deadbolt that uses the Matter protocol. What is the primary advantage of Matter over older smart home protocols?

    Answer: Matter provides interoperability across different smart home ecosystems (Apple, Google, Amazon)

    Matter is an open-source, IP-based connectivity standard designed to ensure smart home devices work seamlessly across different platforms like Apple Home, Google Home, and Amazon Alexa.

  6. When a smart lock uses 'rolling codes' (also called hopping codes) for key fob authentication, what security problem does this solve?

    Answer: It prevents replay attacks where an intercepted code is reused

    Rolling codes generate a new authentication code for each use, so an intercepted code cannot be replayed to gain unauthorized access.

  7. A CPL is asked to recommend a smart lock for a client who wants remote access but lives in an area with frequent internet outages. Which feature is most critical to recommend?

    Answer: Local processing with offline access codes as backup

    A lock with local processing capability and offline access codes ensures the lock remains functional even when internet connectivity is unavailable.