ARP Fields

• Hardware type (2 bytes)

• • Type of MAC hardware
  • 1 for Ethernet

• Protocol type (2 bytes)

• • Type of layer 3 protocol
  • 0x0800 for IP

• Hardware address size

• • Length of hardware addresses in bytes (6 for Ethernet)

• Protocol address size

• • Length of protocol (layer 3) addresses in bytes (4 for IP)