Which four options are the characteristics of the original 802.11 protocol? (Choose four.)
A. Defined DSSS and FHSS as possible methods for modulation
B. Designed to operate in the 5 GHz ISM frequency spectrum
C. The most common deployment is three non-overlapping channels that are 20 MHz wide
D. The protocol sets the maximum throughput at 1 Mb/s or 2 Mb/s
E. Defined FHSS and OFDM as possible methods for modulation
F. The most common deployment is three non-overlapping channels that are 22 MHz wide
G. Designed to operate in the 2.4 GHz ISM frequency spectrum
H. The protocol sets the maximum throughput at 1 Mb/s
I agree with Coffee.
A is only partially correct, E is correct.
Channels 1, 6 and 11 are used as non-overlapping channels, but the most common implementation is DSSS, which uses 22Mhz. OFDM, which uses 20mhz channels, was not defined until 802.11a.
B is not correct because OFDM was not defined until 802.11a.
802.11-1997 supports Diffuse Infrared, FHSS and DSSS, so E is correct.
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