ARP--Address Resolution Protocol
ARP is a program that helps connect an IP address to a physical address (MAC) over a Local Area Network. An analogy/pneumonic device. Apartment's Real Person The IP address on a local address is like an apartment's address in a city. It's helpful to get packages delivered, but it doesn't tell the carrier which apartment it is going. ARP helps the packet get from the apartment gate to the apartment door. Apartment's Real Person.