Q

How does ARP software treat two different responses for a single request?

Suppose a machine implementing address resolution protocol gets two different responses for a single ARP (Address Resolution Protocol) request. How does the ARP software react?
ARP entries are stored in cache on a first-in, first-out basis. Ordinarily, ARP table entries are flushed after two minutes; however, if a new ARP packet is received with newer information that conflicts with an existing cache entry, the outdated entry is immediately overwritten with the new information.
This was last published in November 2002

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