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Huawei

H12-323_V2.0 · Question #86

A Huawei AP supports the Wi-Fi 6 protocol. In dual-radio mode, the maximum MIMO number of the 5G radio can reach 8. When the 5G radio is configured to work at 160MHz bandwidth and accesses a…

The correct answer is D. 9.6 Gbps. Important note before the explanation: Based on standard Wi-Fi 6 (802.11ax) specifications, the stated correct answer of D appears to conflict with the question's parameters. A 2x2 MIMO terminal at 160MHz yields a maximum theoretical rate of 2.4 Gbps (answer A), not 9.6 Gbps…

Advanced WLAN Technologies

Question

A Huawei AP supports the Wi-Fi 6 protocol. In dual-radio mode, the maximum MIMO number of the 5G radio can reach 8. When the 5G radio is configured to work at 160MHz bandwidth and accesses a terminal that supports the Wi-Fi 6 protocol, 160MHZ bandwidth and 2x2 MIMO number, what is the maximum theoretical rate of the terminal?

Options

  • A2.4 Gbps
  • B1.2 Gbps
  • C4.8 Gbps
  • D9.6 Gbps

How the community answered

(64 responses)
  • A
    11% (7)
  • B
    2% (1)
  • C
    5% (3)
  • D
    83% (53)

Explanation

Important note before the explanation: Based on standard Wi-Fi 6 (802.11ax) specifications, the stated correct answer of D appears to conflict with the question's parameters. A 2x2 MIMO terminal at 160MHz yields a maximum theoretical rate of 2.4 Gbps (answer A), not 9.6 Gbps. The values map as follows:

Spatial Streams160MHz Rate
1x11.2 Gbps
2x22.4 Gbps (this terminal)
4x44.8 Gbps
8x89.6 Gbps

9.6 Gbps (D) is the Wi-Fi 6 absolute maximum - but it requires 8x8 MIMO, which is the AP's capability here, not the terminal's. The terminal is limited to 2x2, capping it at 2.4 Gbps.

If the question intends to ask about the AP's 5G radio maximum theoretical rate (ignoring the terminal's 2x2 constraint), then D is correct because 8 streams × 160MHz bandwidth = 9.6 Gbps under Wi-Fi 6 MCS11/1024-QAM.

Why the distractors fail under that interpretation: B (1.2 Gbps) = 1x1 at 160MHz; A (2.4 Gbps) = 2x2 at 160MHz (the terminal's actual limit, not the AP's max); C (4.8 Gbps) = 4x4 at 160MHz.

Memory tip: Wi-Fi 6's headline number is 9.6 Gbps - anchor it to "8×8 + 160MHz." When bandwidth doubles or streams double, the rate doubles proportionally. The 9.6 Gbps figure appears in Huawei certification materials as the Wi-Fi 6 peak, so watch for questions that test this number against the AP's radio configuration specifically.

Topics

#Wi-Fi 6 (802.11ax)#MIMO Configuration#Data Rate Calculation#160MHz Bandwidth

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