Why is transmit power control important when deploying APs?

• A. Increases co-channel interference.
• B. Only affects battery devices.
• C. Controls coverage area and interference; staying within regulatory limits; reduces co-channel interference and energy use.
• D. Always maximize power.

Answer: (C)

Transmit power control is about setting how strong the AP’s signal should be so the coverage fits the intended area without flooding the spectrum. The goal is to balance coverage, interference, and regulatory limits. When power is chosen appropriately, the AP provides solid connectivity where needed, while keeping emissions within legal limits and minimizing wasted energy. This also helps reduce co-channel interference with neighboring APs and other networks, since you’re not creating oversized cells that overlap too much. If power is too high, you waste energy and cause more interference to nearby devices and networks; if it’s too low, coverage can be spotty and data rates drop. So the best approach is to control transmit power to shape the coverage area, minimize interference, stay within regulatory limits, and save energy.