Exam: 200-301: Cisco Certified Network Associate (CCNA) 0 Likes
Which set of 2 4 GHz nonoverlapping wireless channels is standard in (CCNA 200-301)
Which set of 2 4 GHz nonoverlapping wireless channels is standard in the United States?
A. channels 1, 6, 11, and 14
B. channels 2, 7, 9, and 11
C. channels 2, 7, and 11
D. channels 1, 6, and 11
Solution
Correct answer: D. channels 1, 6, and 11.
In the United States, the standard set of 2.4 GHz non-overlapping wireless channels is channels 1, 6, and 11.
Explanation:
In the 2.4 GHz frequency band, each wireless channel occupies a bandwidth of 20 MHz. However, the channels are spaced 5 MHz apart, which means that adjacent channels overlap with each other.
To avoid interference between adjacent channels, it is recommended to use non-overlapping channels. In the 2.4 GHz band, the three non-overlapping channels are:
Channel 1 (2.412 GHz)
Channel 6 (2.437 GHz)
Channel 11 (2.462 GHz)
These three channels are the standard non-overlapping channels used in the United States and many other regions.
The other options are not correct:
A. Channel 14 (2.484 GHz) is not available for use in the United States, as it is reserved for use in Japan.
B. Channels 2, 7, and 9 are overlapping channels and not considered non-overlapping.
C. Channel 9 is an overlapping channel, so the set of 2, 7, and 11 is not the standard non-overlapping set.
Therefore, the correct answer is D. channels 1, 6, and 11, which is the standard set of 2.4 GHz non-overlapping wireless channels used in the United States.
Category: Network Access