Why do network engineers obsess over Wi-Fi channels 1, 6, and 11?
Do you know why 2.4 GHz channel design relies on 1, 6, and 11? Drop your answer in the comments!
The question
Why do enterprise 2.4 GHz Wi-Fi designs exclusively use channels 1, 6, and 11?
The answer
A They are non-overlapping 20 MHz bands
Each channel needs twenty megahertz of width with five megahertz channel spacing, so only one, six, and eleven avoid overlapping interference. Don't fall for B—bonding to forty megahertz in two point four is terrible practice!
Exam tip
Read what the question is actually asking before looking at the options. The wrong answers here are ones candidates genuinely pick — each is true of something adjacent, just not of what was asked.