What is available of the following that support the 802.11 standard of 5G frequency band? (Select 3 Answers)

Question

Options

• A802.11a
• B802.11g
• C802.11b
• D802.11n
• E802.11ac
• F802.11

• A
  81% (25)
• B
  10% (3)
• C
  6% (2)
• F
  3% (1)

Explanation

802.11a (1999) was the first standard to operate exclusively on the 5 GHz band, while 802.11n (Wi-Fi 4) introduced dual-band capability supporting both 2.4 GHz and 5 GHz, and 802.11ac (Wi-Fi 5) operates exclusively on 5 GHz with significantly higher throughputs - making A, D, and E the correct choices.

802.11b (Wi-Fi 1) and 802.11g (Wi-Fi 3) are wrong because both operate solely on the 2.4 GHz band - they were designed for longer range and backward compatibility, not 5 GHz performance. The original 802.11 (1997) is also wrong; it used 2.4 GHz (and infrared) and predates 5 GHz consumer adoption.

Memory tip: Think of the letters - "A" goes high (5 GHz only, always has), "B" and "G" stay low (2.4 GHz crowd), "N" does both (middle child, dual-band), and "AC" goes high again (5 GHz only, faster). A handy phrase: "A and AC are Above; B and G are Below; N is aNywhere."

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