What is the purpose of regulatory domains and channel planning in Wi-Fi?

• A. Regulatory domains define allowed frequencies and power rules
• B. Channel planning ensures non-overlapping channels
• C. Power settings determine regulatory compliance
• D. Regulatory domains impose country-specific rules and channel planning reduces interference

Answer: (D)

The main idea is that Wi‑Fi must operate within legal limits for the country and also be designed to minimize interference with other networks. Regulatory domains set the country-specific rules for what frequencies can be used and how much power can be transmitted. Channel planning is the practical process of choosing which channels your access points use to avoid overlapping and interference, especially when multiple APs are deployed in the same area. Together, they ensure compliant operation and better network performance. For example, the chosen channels in a dense environment are planned to be non-overlapping where possible, while the device’s regulatory domain ensures you’re using only the allowed bands and power levels.