Chapter 3
1. C. Because both transmitters are using the same channel, the interference is described as co-channel.
2. E. Cisco recommends a separation of at least 19 dBm, so +20 dBm is the only correct answer.
3. B. The two channels being used are adjacent, so their signals overlap by some degree. The resulting interference is called adjacent channel interference.
4. D. In the 2.4-GHz band, channels 1, 6, and 11 are the only ones that are spaced far enough apart (five channel numbers) that they do not overlap.
5. A. Energy traveling in an electromagnetic wave spreads in three dimensions, weakening the signal strength over a distance.
6. B. The 802.11b and g devices operate at 2.4 GHz, which is less affected by free space loss than the 802.11a ...
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