CompTIA Tech+ (FC0-U71)InfrastructureMedium
A technician is setting up a wireless network in a large multi-story office building. To ensure comprehensive coverage and minimize interference, the technician plans to deploy multiple access points (APs) and configure them to operate on non-overlapping channels. For the 2.4 GHz band, which combination of channels should the technician primarily use?
- A2, 7, 12
- B1, 6, 11
- C4, 8, 12
- D1, 3, 5
Show answer & explanationAnswer & explanation
Correct answer: B. 1, 6, 11
In the 2.4 GHz Wi-Fi band, channels 1, 6, and 11 are the only three non-overlapping channels. Using these specific channels for adjacent access points helps to minimize co-channel interference and improve overall network performance.
Why the other options are wrong
- A. Channels 2, 7, and 12 overlap significantly with adjacent channels.
- C. Channels 4, 8, and 12 overlap significantly with adjacent channels.
- D. Channels 1, 3, and 5 overlap significantly, causing interference.
2.4 GHz Wi-Fi Non-Overlapping Channels
Specific 2.4 GHz Wi-Fi channels (1, 6, and 11 in North America) that do not overlap in frequency, allowing multiple access points to operate in proximity without causing significant interference to each other.
- Each 2.4 GHz Wi-Fi channel is 22 MHz wide but spaced 5 MHz apart.
- Using non-overlapping channels prevents co-channel interference.
- Crucial for effective multi-AP deployments in dense environments.
Memory trick: One, Six, Eleven: No Overlap, Heaven!