How to detect arp poisoning?

Hi,
I now, that Avast protect me from ARP poisoning, but how to detect it manually?
How to (if network is poisoned) “heal” LAN? And how to protect from it?
AAAD…

Read here on a how to under MS Windows:
https://www.comparitech.com/blog/vpn-privacy/arp-poisoning-spoofing-detect-prevent/Info credits go to Josh Lake *

Various methods - via command prompt, via programs like Wireshark etc.

(*forget about the proposed adverts on that link source - pol.).

polonus