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16.
Wireless LAN operation is defined in which one of the following standards?
- A.802.1
- B.802.2
- C.802.3
- D.802.11
- E.802.15
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The IEEE 802.11 standard is the official specification for wireless LAN operation. |
17.
Which one of the following specifies the correct list of non-overlapping channels for
DSSS use in the 2.4-GHz band?
- A.1, 2, 3
- B.1, 5, 10
- C.1, 6, 11
- D.1, 8, 13
- E.All of channels 1-14
- Answer & Explanation
- Report
Answer : [C]
Explanation :
Explanation :
| Only channels 1, 6, and 11 are non-overlapping. The 2.4-GHz channels are spaced 5 MHz apart, whereas the DSSS channel width is 22 MHz. |
18.
The U-NII-1 band begins at which one of the following channel numbers?
- A.0
- B.1
- C.24
- D.36
- Answer & Explanation
- Report
Answer : [D]
Explanation :
Explanation :
| The first U-NII-1 channel is labeled channel 36. |
19.
Which of the following standards apply to wireless LAN operation in the 5-GHz
band? (Choose all that apply.)
- A.IEEE 802.1
- B.IEEE 802.11g
- C.IEEE 802.11a
- D.IEEE 802.11n
- E.IEEE 802.11ac
- F.IEEE 802.11b
- G.IEEE 802.11-2012
- Answer & Explanation
- Report
Answer : [C,D,E,G ]
Explanation :
Explanation :
| IEEE 802.11a is strictly for 5 GHz, 802.11n includes both 2.4- and 5-GHz bands, and 802.11ac is limited to 5 GHz. The IEEE 802.11-2012 standard has all of these amendments rolled up into one document. IEEE 802.11g and 802.11b deal with the 2.4-GHz band. |
20.
Which of the following wireless LAN standards use OFDM for transmissions?
(Choose all that apply.)
- A.802.11-1997
- B.802.11b
- C.802.11g
- D.802.11a
- Answer & Explanation
- Report
Answer : [C and D]
Explanation :
Explanation :
| Both 802.11g and 802.11a define OFDM use, even though the two standards use different bands. |
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