ARP message

ARP message

1. Encapsulated directly within Ethernet frame

2. There is no IPv4 header

3. The APR requests is encapsulated in an Ethernet frame using the following header information:

   • Destination MAC address
     • This is a broadcast address FF-FF-FF-FF-FF-FF requiring all Ethernet NICs on the LAN to accept and process the ARP request.
   • Source MAC address
     • This is MAC address of the sender of the ARP request.
   • Type
     • ARP messages have a type field of 0x806. This informs the receiving NIC that the data portion of the frame needs to be passed to the ARP process.