$ arp -a
? (192.168.0.4) at xx:xx:xx:xx:xx:xx on en1 ifscope [ethernet] ? (192.168.0.6) at xx:xx:xx:xx:xx:xx on en1 ifscope [ethernet] ? (192.168.0.8) at xx:xx:xx:xx:xx:xx on en1 ifscope [ethernet] ? (192.168.0.255) at ff:ff:ff:ff:ff:ff on en1 ifscope [ethernet]
