arp is binary for Address Resolution Protocol (ARP)

Arp Commands

all your ARP entries
arp -a

delete an IP address
arp -d 192.168.100.10

delete all entries in the ARP table
arp -d -a

add an entry to the ARP table
arp -s ADDRESS MAC_ADDRESS

• ADDRESS is the address to be added
• MAC_ADDRESS is the MAC address of the machine