H12-311_V3.0 · Question #31
In 1999, the IEEE 802.11a standard was formulated, which stipulated that the working frequency band of wireless local area network was 5.15-5.825GHz, and the data transmission rate reached 11Mbps.
The correct answer is B. False. Option B is correct because the statement contains a factual error about the data transmission rate. While IEEE 802.11a was indeed standardized in 1999 and does operate in the 5.15-5.825 GHz frequency band, its maximum data rate is 54 Mbps, not 11 Mbps. The 11 Mbps figure…
Question
In 1999, the IEEE 802.11a standard was formulated, which stipulated that the working frequency band of wireless local area network was 5.15-5.825GHz, and the data transmission rate reached 11Mbps.
Options
- ATrue
- BFalse
How the community answered
(38 responses)- A24% (9)
- B76% (29)
Explanation
Option B is correct because the statement contains a factual error about the data transmission rate. While IEEE 802.11a was indeed standardized in 1999 and does operate in the 5.15-5.825 GHz frequency band, its maximum data rate is 54 Mbps, not 11 Mbps. The 11 Mbps figure actually belongs to IEEE 802.11b, a different standard also ratified in 1999, which operates in the 2.4 GHz band. Option A is wrong because accepting the statement as true would require ignoring the incorrect speed figure embedded within it.
Memory tip: Pair the letters with their speeds - 802.11a = 54 Mbps (think "a" for "advanced, faster"), and 802.11b = 11 Mbps (think "b" for "basic, slower"). Both were released in 1999, but they differ in both frequency band and speed.
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