Not sure if my question is on-topic here. I found the following question about ARP requests from a different subnet and I was wondering if and when this is an actual use case. The original question is about required ACLs for ARP requests. One of the answers is, that an ACL has to be implemented when the ARP request comes from a different subnet.
So my question is: when will that ever be the case? If the target node is within the same subnet the source will broadcast an ARP request, if it's not within the subnet, the packet would be sent to the default gateway. And the receiving router would be either in the correct subnet or would send it to its default gateway.
If the question is off-topic here, maybe you could point me to the correct stack exchange site?!