a. Distinguish among the frequency spectrum, service bands, and channels.

9a1.) The frequency spectrum extends __________.

a. Into the gigahertz range

b. Into the visible light range

c. Into the ultraviolet range

d. To infinity

9a2.) In Wi-Fi, 2.4 GHz  and 5 GHz  refer to __________.

a. Frequency spectrums

b. Broad bands

c. Channels

d. None of the above

b. In radio, how can you send multiple signals without the signals interfering with one another?

9b.) To handle multiple conversations in 802.11 transmission, you normally use multiple __________.

a. Channels

b. Frequencies

c. Service bands

d. Wires

c. How many channels are there in the FM  band? (You can compute this from information in the text.)

d. Are the set of frequencies used for police communication in a city channels or a service band? Explain.

9d.) The set of frequencies used for police communication in a city are __________.

a. Channels

b. Frequencies

c. Spectrums

d. None of the above

e. An F M  radio station is called Moldy Oldies 101.1. Is this a channel or a service band?

9e.) An FM radio station is called Moldy Oldies 101.1. The 101.1 refers to its __________.

a. Single frequency

b. Channel

c. Service band

d. None of the above

f. Wi-Fi operates in the 2.4 GHz __________ and the 5 GHz __________.

9f.) Wi-Fi operates in the 2.4 GHz and the 5 GHz __________.

a. Frequencies

b. Spectrums

c. Channels

d. Service bands