Difference between the  5 ghz and the 2.4 ghz network on the Airport Extreme

Strenght signal-wise, is there a difference between the  5 ghz and the 2.4 ghz network on the Airport Extreme?
Is the 5 ghz network on the Airport Extreme the 802.11n signal that is supossed to have better speed and strenght than the 802.11g spec?
I am confused because I can not tell the difference in performance between both signal on my new A.E.

The laws of physics always dictate that in order to gain something....let's say speed....you have to give up something else.
In return for higher speed capabilities, 5 GHz signals are not as strong as 2.4 GHz signals, so they do not travel as far, or penetrate obstructions as well as 2.4 GHz signals.
If your Mac is in close proximity to the AirPort Extreme, it will probably connect to the 5 GHz band. If you take your Mac to the other end of the house, it will probably connect to the 2.4 GHz band. The point is, the Mac will choose the best signal quality and connect automatically based on its location in relation to the AirPort Extreme.
If you are curious to know which band the Mac is connecting to at an given time, hold down the option key on your Mac while you click on the fan shaped AirPort icon and look for the Channel setting. You will see either 2.4 GHz or 5 GHz displayed.

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