What does incomplete mean in an ARP entry

If the value of MAC ADDRESS in an ARP entry is Incomplete, this ARP entry is a temporary one. When IP packets trigger ARP Miss messages, the device generates temporary ARP entries and sends ARP Request packets to the destination network segment.
When a temporary ARP entry is not aged out:
Before receiving an ARP Reply packet, the device discards the IP packets matching the temporary ARP entry, and no ARP Miss message is triggered.
After receiving the ARP Reply packet, the device generates a correct ARP entry to replace the temporary entry.
After the temporary ARP entry ages out, the device deletes this entry.

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