Discussion
What is the frequency range of the IEEE 802.11a standard?
Answer: D
Correct answer: 5GHz
802.11a operates in the 5 GHz U-NII bands. Note that two of the options are given in Gbps - a data rate, not a frequency - so they can be eliminated on units alone before any knowledge of the standard is applied. The move to 5 GHz is what gives 802.11a its twelve non-overlapping channels and its shorter range, since higher frequencies attenuate faster.
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