What is the range of working frequency stipulated in 2.4 GHz band?

Question

Options

• A2.4GHz-2.4835GHz
• B2.471GHz-2.497GHz
• C2.4465GHz-2.4835GHz
• D2.445GHz-2.475GHz

• A
  72% (28)
• B
  18% (7)
• C
  8% (3)
• D
  3% (1)

Explanation

Option A is correct because the 2.4 GHz band, as defined by IEEE 802.11 standards and international regulatory bodies (ITU, FCC), spans from exactly 2.400 GHz to 2.4835 GHz - this is the full, standardized working range used globally for Wi-Fi and other wireless technologies. Option B (2.471–2.497 GHz) is wrong because it starts too high and extends beyond the band's upper limit, roughly corresponding to channels 12–14 only. Option C (2.4465–2.4835 GHz) is wrong because it cuts off the lower portion of the band, and option D (2.445–2.475 GHz) is wrong because it represents only a narrow middle slice, not the full working range.

Memory tip: Anchor on the two clean numbers - the band starts at exactly 2.4 GHz (easy to remember, it's the band's name) and ends at 2.4835 GHz. Think of it as "2.4 to just under 2.5," with the upper boundary stopping at 2.4835, roughly 16.5 MHz short of 2.5 GHz.

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