olemus
(a) ARP-päring IP-aadressilt samale IP-aadressile
= a broadcast request own IP address

(b) päringuta ARP-vastus
= a special ARP reply that is not a response to an ARP request

ülevaateid
https://www.practicalnetworking.net/series/arp/gratuitous-arp/

https://wiki.wireshark.org/Gratuitous_ARP

https://networkengineering.stackexchange.com/questions/7713/how-does-gratuitous-arp-work

https://techhub.hpe.com/eginfolib/networking/docs/switches/5120si/cg/5998-8491_l3-ip-svcs_cg/content/436042632.htm

vt ka
- GARP-rünne