ARP
Address Resolution Protocol
Is used to discover the Layer 2 address (MAC address) of a known Layer 3 address (IP address).
Consists of two messages:
ARP Request
Is broadcast. Destination MAC: FFFF.FFFF.FFFF
ARP Reply
Is unicast.
ARP Table
Use arp -a to view the ARP table.
Correlates an IP address with a MAC address (Physical Address).
Static
Is a default entry.
Dynamic
Learned via ARP.
Last updated