In WLAN networks, the Wi-Fi 6 standard has the advantages of large bandwidth, high concurrency, low latency, and low power consumption. Which of the following technologies does Wi-Fi 6 use to reduce…

Question

Options

• AOFDMA technology
• B8x8 MINO spatial stream
• CBSS Color Technology
• DTWT technology

• A
  75% (18)
• B
  8% (2)
• C
  13% (3)
• D
  4% (1)

Explanation

OFDMA (Orthogonal Frequency Division Multiple Access) reduces latency by splitting a channel into smaller sub-channels called Resource Units (RUs), allowing multiple devices to transmit simultaneously rather than waiting in turn. This parallel access eliminates the queuing delay that plagued older Wi-Fi standards where devices had to take turns using the full channel.

Why the distractors are wrong:

• B (8x8 MIMO) - Multiple antenna streams increase throughput and capacity, not latency. MIMO sends more data at once, but doesn't solve the waiting problem.
• C (BSS Color) - BSS Color tags transmissions from different networks to reduce interference and unnecessary back-off, improving efficiency, but it targets collision avoidance between overlapping networks, not latency directly.
• D (TWT - Target Wake Time) - TWT lets devices schedule when to wake up and communicate, which is the Wi-Fi 6 feature responsible for low power consumption, not low latency.

Memory tip: Match each Wi-Fi 6 feature to its benefit using the acronym OBT-P:

• OFDMA → Latency (On time, multiple users)
• BSS Color → Interference reduction
• TWT → Power saving
• MIMO → Throughput/bandwidth

If an exam question asks about latency, OFDMA is your answer; if it asks about power, TWT is the pick.

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