Practice Test Geeks(VDV) Voice Data Video Technician Certified Practice Test
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Wireless Technology Flashcards

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

Read the first 7 Wireless Technology flashcards as text

  1. In the context of wireless networks, what does 'roaming' describe?

    Answer: A client device transitioning from one access point to another while maintaining connectivity

    Wireless roaming is the process by which a mobile client seamlessly transitions its association from one AP to another as it moves through a coverage area.

  2. What is the primary advantage of using the 5 GHz band over the 2.4 GHz band for Wi-Fi?

    Answer: More available non-overlapping channels and less congestion

    The 5 GHz band has up to 25 non-overlapping channels in the US, significantly reducing co-channel interference compared to 2.4 GHz's three non-overlapping channels.

  3. Which IEEE standard defines Quality of Service (QoS) for wireless networks, prioritizing voice and video traffic?

    Answer: 802.11e (WMM)

    802.11e introduced wireless QoS via WMM (Wi-Fi Multimedia), which prioritizes voice, video, best-effort, and background traffic categories.

  4. A technician is troubleshooting a DECT phone system that has poor coverage in a large facility. What is the typical operating frequency of DECT in North America?

    Answer: 1.92 GHz – 1.93 GHz

    DECT (Digital Enhanced Cordless Telecommunications) operates in the 1.92–1.93 GHz band in North America, avoiding the crowded 2.4 GHz ISM band.

  5. What is the purpose of a captive portal in a wireless network deployment?

    Answer: To redirect users to an authentication or terms-of-service page before granting internet access

    A captive portal intercepts HTTP traffic and redirects users to a login or terms-of-service page, commonly used in guest Wi-Fi networks.

  6. In wireless system design, what does 'link budget' calculation determine?

    Answer: Whether the received signal power will be sufficient to maintain a reliable connection over a given distance

    A link budget accounts for transmit power, antenna gains, cable losses, and free-space path loss to verify adequate signal margin for a wireless link.

  7. Which wireless authentication method requires a RADIUS server infrastructure and issues individual credentials per user?

    Answer: WPA2-Enterprise (802.1X)

    WPA2-Enterprise uses 802.1X authentication with a RADIUS server, requiring each user to present unique credentials (username/password or certificate).