Many wireless routers will automatically select the channel for you upon initial setup, where depending on your wireless environment, it could lead to slow Wi-Fi speeds and interference. As an example, most home networks utilize routers that by default, run on channel 6 (2.4 GHz). And, when neighboring home Wi-Fi networks run over the same channel, they generate radio interference. This can cause significant network performance slowdowns for everyone running on that channel.
If all of this is confusing to you, just imagine a high-speed train. It enters your home through your (modem), travels to the train station (router) at full speed, and is redirected (via the 2.4GHz and 5GHz bands) to a destination (connected devices). If the destination is a wired connection, then it moves at full speeds. If the destination is wireless, the speed is based on how many tracks (streams) it can use at once. Thus, the amount of congestion these tracks must penetrate, and the distance between the train station and the destination. Will equate to the train loosing speed the further it travels away from the station.
Put simply, you are not going to get Gigabit speed (1,000Mbps) if you are only paying for a 300Mbps connection. Likewise, you are also not going to get the 300Mbps you are paying for if you do not have the right router! Which is why avoiding issues like blind spots and interference by setting your home network up correctly in the first place is so important!
2.4 vs 5 GHz Performance vs Reliability
|2.4 GHz||5 GHz|
|Operating Distance||Travels farther||Less range|
|Barriers||Less signal loss||More signal loss|