1, wlan and wifi actually have the same function, but wlan covers a wider area.
2, such as large shopping malls, restaurants or public places, but wifi does not reach this level, so generally speaking, small families will install WiFi;
3.wlan will be installed in large facilities or entertainment places, and its functions are the same;
4. All this is to enable any handheld device to network and communicate without turning on the GPRS device.