As a support tech you will be asked by customer about the range of their routers, or you might need to choose a router to cover an area. This article shows some of the range of WiFi and Bandwidth you might get with the different router protocols.
All of these rough estimates fall on the high end of the range seen in practice. Obstructions in home such as brick walls and metal frames or siding can greatly reduce the range of a Wi-Fi LAN by 25% or more. Because 802.11a employs a higher signalling frequency than 802.11b/g/n, 802.11a is most susceptible to obstructions. Interference from microwave ovens, cordless phones and other equipment that operates in the same frequency as the WLAN also affects range. 802.11ac has the same range as 802.11n, but is faster at the same distances.
|802.11 Protocol||Freq (GHz)||Bandwidth (MHz)||Approximate indoor range||Approximate outdoor range|
|–||2.4||20||20 m / 66 ft||100 m / 330 ft|
|a||3.7 – 5||20||35 m / 115 ft||120 m / 390 ft|
|b||2.4||20||35 m / 115 ft||140 m / 460 ft|
|g||2.4||20||38 m / 125 ft||140 m / 460 ft|
|n||2.4 – 5||20 – 40||70 m / 230 ft||250 m / 820 ft|
|ac||5||20 – 40 – 80 160||70 m / 230 ft||250 m / 820 ft|
For more precise try the WiFi Range Calculator at – https://www.radiolabs.com/stations/wifi_calc.html
Articles about improving WiFi signal in the home.
1. Top 10 Ways to Boost Your Home Wi-Fi (Lifehacker) – http://lifehacker.com/5931743/top-10-ways-to-boost-your-home-wi-fi
2. 10 Ways to Boost Your Wireless Signal (PC Mag) – http://www.pcmag.com/article2/0,2817,2372811,00.asp
3. How to Boost Your WiFi Signal (Quick & Dirty) – http://www.quickanddirtytips.com/tech/how-boost-your-wifi-signal-part-1