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Txpower - what's the use?


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I have a question about the txpower of wireless cards. In this case, I am using the Alfa Awus 036H on wlan1.

I use the iw reg set BO command to tell my system that I'm in Bolivia. This allows me to use iwconfig wlan1 txpower 30. Previously I could use a maximum txpower of 20.

My question is: how is this useful?

From what I've read, if I create a soft AP with airbase-ng, then a higher txpower makes my transmissions more likely to override those of the genuine AP.

When else is a higher txpower helpful? Does it work with ARPspoofing. If I am sending out packets saying " (the router) is located at MAC 11:22:33:44:55:66", is it beneficial to have a higher txpower?

Are there any other situations when a higher txpower is beneficial?

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