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. What is the maximum data rate of 802.11ac (Wi-Fi 5) in the 80 MHz channel configuration?

    Answer: 433 Mbps

    802.11ac with a single spatial stream in 80 MHz channel width achieves up to 433 Mbps.

  2. Which wireless frequency band is most susceptible to interference from microwave ovens?

    Answer: 2.4 GHz

    Microwave ovens operate near 2.45 GHz and can significantly interfere with 2.4 GHz Wi-Fi networks.

  3. In a MIMO antenna system, what does the term 'spatial multiplexing' refer to?

    Answer: Transmitting multiple data streams simultaneously over the same channel

    Spatial multiplexing uses multiple antennas to send independent data streams simultaneously, increasing throughput.

  4. What is the purpose of a wireless site survey before installing an enterprise Wi-Fi network?

    Answer: To identify RF coverage, interference sources, and optimal AP placement

    A site survey maps RF signal strength, detects interference, and determines optimal access point locations for full coverage.

  5. Which Wi-Fi security protocol uses a 4-way handshake to establish encryption keys?

    Answer: WPA/WPA2

    WPA and WPA2 use a 4-way handshake between the client and access point to derive and confirm the Pairwise Transient Key (PTK).

  6. A VDV technician notices a wireless network using channels 1, 5, and 9 in the 2.4 GHz band. What is wrong with this configuration?

    Answer: Only channels 1, 6, and 11 are non-overlapping in the US

    In the US 2.4 GHz band, only channels 1, 6, and 11 are non-overlapping; channels 1, 5, and 9 cause co-channel interference.

  7. What does the term 'hidden node problem' describe in wireless networks?

    Answer: Two clients that cannot hear each other but both transmit to the same AP, causing collisions

    The hidden node problem occurs when two wireless clients are in range of the AP but not each other, causing simultaneous transmissions and collisions at the AP.