For example, when wireless network routers, such as Wi-Fi routers or cell-phone towers, use the same frequency and are within range of each other, they interfere with each other’s communication, slowing down the speed of both routers. One solution to this problem is to lower the transmission power of both routers so that they are no longer within range of one another. But if only one router is using low power, then its signal is overwhelmed by the high-power router.
