I just got a new "dual band" wireless router. The sales rep didn't really understand the difference between the "2.4G" and "5G" wireless networks that the router supports.
Can anyone please explain the difference to me?
Unlike "3G" and "4G" in the mobile phone world which refer to "third generation" and "fourth generation" mobile phone technology, the "2.4G" and "5G" numbers in Wi-Fi are radio frequency bands. 2.4G is short for the 2.4GHz band, and 5G is short for the 5GHz band (roughly 5.1 to 5.8 GHz, with some gaps in between depending on the country and regulator agency).
There is a reasonable article on the Cisco website that highlights the differences.
In a nutshell, the 2.4GHz band gives you longer range, whereas the 5GHz band offers more channels that are less likely to be polluted with interference.
It is better to use the 2.4 GHz wireless band if you are going to connect over a larger distance (but unlike 5ghz, it's more likely to have network traffic). The 5 GHz band offers higher bandwidth for faster downloading, uploading and streaming videos online, but works best over shorter distances without many obstructions such as walls,