The highest Wi-Fi standard of a certain indoor AP is 802.11ax, the MIMO number can reach 12- 12:8, and it supports dual-radio and triple-radio modes. Which of the following descriptions about the AP…

Question

Options

• AThere are 12 antennas at the receiving end
• BCan use 2.4GHz and 5GHz bands at the same time
• CThere are 12 antennas at the transmitting end
• DSupports up to 12 spatial streams

• A
  10% (4)
• B
  83% (34)
• C
  5% (2)
• D
  2% (1)

Explanation

Option B is the wrong description because this AP supports triple-radio mode, which can operate three radios simultaneously - for example, one 2.4 GHz and two 5 GHz radios, or even three 5 GHz radios. Saying it "can use 2.4 GHz and 5 GHz bands at the same time" only describes dual-radio capability and is either incomplete or outright inaccurate in triple-radio configuration.

Why A and C are correct: The MIMO notation 12×12:8 uses the standard T×R:S format - 12 transmit (T) antennas and 12 receive (R) antennas - so both A and C accurately describe this AP.

Why D is correct: The :8 in the notation means 8 spatial streams per radio. Since this is a multi-radio AP, total simultaneous spatial streams across all radios can reach 12 (e.g., three radios each carrying 4 streams: 4+4+4=12), making D a valid statement.

Memory tip: Lock in the T×R:S MIMO formula - Transmit antennas × Receive antennas : Streams per radio. When you see "triple-radio," remember it means three simultaneous radios, which goes beyond the simple "2.4 + 5 GHz" dual-band assumption that trips up B.

No community discussion yet for this question.