This video will teach how to pentest / " hack " wifi networks that can be found anywhere.
This video is for educational purposes only and is meant to help you understand how networks are commonly hacked to be able to protect yourself, family and friends against it.

The issue highlighted in this video demonstration is from an old networking protocol that is rarely used in the modern world as WPA3 and some WPA2 routers & endpoints (such as mobile hotspots) employ "protected frames" that prevent deauthentication packets and essentially make this useless.

- Kali linux: https://www.kali.org/
I recommend installing kali linux in a virtual machine, if you do not know how to do this please look up some videos on how to do it.

Wifi / network hacking is not by itself illegal when used properly on authorized hardware, in other words you must MAKE SURE THAT YOU HAVE THE PROPER AUTHORIZATIONS OR OWN THE HARDWARE THAT IS BEING TESTED AS IT IS OTHERWISE ILLEGAL.

It is beneficial to gain understanding on how attackers might look to attack your network to be able to prevent it before it happens, especially considering how most old networks are hackable with this method, so you can most certainly make improvement on your own network at home by for instance, as highlighted in the video, employ randomized long passwords that are unlikely to be present in word lists.

Here are the timestamps:
0:00 Introduction
0:22 How it works
0:48 How to do it
5:03 How to protect yourself against this