@type [ARP]

@desc
    Peer requests host's MAC given its IP and host replies.

@IP  [10.0.0.4] 
@MAC [56:34:f5:4d:4f:44]

@timeline
    <= [ ETHERNET | IP | 6 | 4 | REQUEST | 00:34:56:34:f5:4f | 10.0.0.5 | 00:00:00:00:00:00 | 10.0.0.4 ]
    => [ ETHERNET | IP | 6 | 4 | REPLY   | 56:34:f5:4d:4f:44 | 10.0.0.4 | 00:34:56:34:f5:4f | 10.0.0.5 ]