About
The mac address is a local net identifier for a network interface (adapter).
Mac Header
It's part of every packet in the mac header
How to get it on Windows?
With netsh:
netsh wlan sh int
Name : Wi-Fi
Description : Intel(R) Dual Band Wireless-AC 8265 #4
GUID : xxxxxxxxxxxxxxx
Physical address : 5c:5f:67:6b:cb:9b <---- The mac address
Interface type : Primary
State : connected
SSID : xxx-xxx
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