ARP Processing

• See ARP dynamics in figs 4.2, 4.4, 4.5

• ARP responses are cached. Replacement:

  • Cache table fills up => LRU policy used
  • Timeout: e.g., 20 minutes
  • Others may snoop on ARP, IP packets for address bindings

• Note:

  • A point-to-point link like SLIP does not require ARP.
  • Telephony does not require ARP.

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