WIRELESS NETWORKS AND MOBILE IP
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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900 MHz
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2.4 GHz
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4 GHz
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5 GHz
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Detailed explanation-1: -IEEE 802.11 uses various frequencies including, but not limited to, 2.4 GHz, 5 GHz, 6 GHz, and 60 GHz frequency bands. Although IEEE 802.11 specifications list channels that might be used, the radio frequency spectrum availability allowed varies significantly by regulatory domain.
Detailed explanation-2: -Wi-Fi 4/802.11n. Approved in 2009, Wi-Fi 4 enables operation in both the 2.4 and 5 GHz frequencies, a game changer at the time.
Detailed explanation-3: -802.11g supports bandwidth up to 54 Mbps, and it uses the 2.4 GHz frequency for greater range.
Detailed explanation-4: -IEEE 802.11b and 802.11g standards use the unprotected 2.4 GHz frequency band. The 802.11a standard uses the 5 GHz frequency band. Operating in an unregulated frequency band, 802.11b and 802.11g equipment suffer interference from microwave ovens, cordless phones, and other appliances using the same 2.4 GHz ISM band.