A clause 15 radio uses ___________ and supports data rates of ___________
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A. B. C. D.B.
Clause 15 refers to the IEEE 802.11b standard, which uses Direct Sequence Spread Spectrum (DSSS) modulation and operates in the 2.4 GHz frequency band.
Option A mentions that the Clause 15 radio can use either Frequency Hopping Spread Spectrum (FHSS) or DSSS modulation and supports data rates from 1 Mb/s up to 11 Mb/s. This is incorrect as 802.11b does not support FHSS modulation, and the maximum data rate for DSSS modulation in 802.11b is 5.5 Mb/s or 11 Mb/s depending on the channel width.
Option B states that the Clause 15 radio uses only DSSS modulation and supports data rates of 1 Mb/s and 2 Mb/s. This is also incorrect as 802.11b supports data rates up to 11 Mb/s.
Option C suggests that the Clause 15 radio uses only FHSS modulation and supports data rates of 1 Mb/s and 2 Mb/s. This is incorrect as mentioned earlier, 802.11b does not support FHSS modulation.
Option D is the correct answer. The Clause 15 radio uses DSSS modulation and supports data rates of 1 Mb/s up to 11 Mb/s, depending on the channel width.
Therefore, option D is the correct answer.