a. In what two unlicensed service bands does 802.11 usually operate?

13a.) 802.11 operates in the _______ unlicensed service band.

a. 2.4 MHz 

b. 60 MHz 

c. Both A and B

d. Neither A nor B

b. How many 20 MHz  non-overlapping channels does the 2.4 GHz  band support?

13b.) The 2.4 GHz  band supports _______ possible non-overlapping 20 MHz  channel(s).

a. 1

b. 3

c. 7

d. 11

c. Why is this a problem?

13c.) In general, the fewer the channels, _______.

a. The greater the likelihood of interference between access points

b. The smaller the individual channels will be

c. Both A and B

d. Neither A nor B

d. Why are companies moving rapidly into the 5 GHz  band?

13d.) Companies prefer the 5 GHz band to because there is _______ than in the 2.5 GHz band.

a. More bandwidth

b. Less absorptive attenuation

c. Both A and B

d. Neither A nor B

e. If you triple channel bandwidth, what happens to the number of channels in a service band? (The answer is not directly in the text.)

13e.) If you triple channel bandwidth, what happens to the number of channels in a service band?

a. It triples.

b. It increases by a factor of nine.

c. It is reduced to a third.

d. It is reduced to a ninth.