Which of the following wireless technologies can operate at only 5GHz?
A.
802.11b/g
B.
802.11g
C.
802.11b
D.
802.11a
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Answer is 802.11a – New frequency extension apparently not considered. IEEE 802.11y-2008 extended operation of 802.11a to the licensed 3.7 GHz band. Increased power limits allow a range up to 5,000 m. As of 2009, it is only being licensed in the United States by the FCC.
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