How to show IP / MAC Address

The command to show ip and mac address in a network is : apr -a

? (192.168.1.1) at c4:a8:1d:3a:5:a5 on en1 ifscope [ethernet]

? (192.168.1.6) at cc:b1:1a:bb:63:d6 on en1 ifscope [ethernet]