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Wireless Standards & Radio Frequency Fundamentals 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.

Read the first 7 Wireless Standards & Radio Frequency Fundamentals flashcards as text

  1. Which IEEE 802.11 amendment introduced OFDMA as a key feature for improved multi-user efficiency?

    Answer: 802.11ax

    802.11ax (Wi-Fi 6) introduced Orthogonal Frequency Division Multiple Access (OFDMA), allowing simultaneous transmission to multiple clients in the same channel.

  2. What is the primary frequency band used by Bluetooth Classic and Bluetooth Low Energy (BLE)?

    Answer: 2.4 GHz

    Both Bluetooth Classic and BLE operate in the 2.4 GHz ISM band using frequency hopping spread spectrum.

  3. In RF propagation, what term describes signal power loss due to distance in free space?

    Answer: Free-space path loss

    Free-space path loss (FSPL) is the reduction in signal power as it travels through free space, increasing with both frequency and distance.

  4. Which modulation scheme is used by 802.11ax to achieve its highest data rates?

    Answer: 1024-QAM

    802.11ax (Wi-Fi 6) uses 1024-QAM, encoding 10 bits per symbol to achieve higher throughput compared to the 256-QAM of Wi-Fi 5.

  5. What does the term 'channel bonding' refer to in wireless networking?

    Answer: Aggregating adjacent channels to increase bandwidth

    Channel bonding combines two or more adjacent channels to create a wider channel (e.g., 40, 80, or 160 MHz) for higher throughput.

  6. What is the Effective Isotropic Radiated Power (EIRP)?

    Answer: The total power radiated by a theoretical isotropic antenna in the direction of maximum gain

    EIRP is the product of the transmitter's output power and the antenna gain (minus losses), representing the effective power radiated in the main beam.

  7. Which wireless standard operates exclusively in the 60 GHz band and is designed for very short-range, multi-gigabit links?

    Answer: 802.11ad (WiGig)

    IEEE 802.11ad, also known as WiGig, operates in the 60 GHz mmWave band and supports multi-gigabit speeds over very short distances (typically under 10 meters).