This read-create object holds the IP address for a Proxy ARP entry, per the description. Admins configure it to specify which address range, together with the paired subnet mask, the device should answer ARP requests for on behalf of hosts it can reach but that can't directly answer themselves. For example, in a network where hosts on two segments need to appear to be on the same subnet, an admin creates a proxy ARP entry with this object set to the target network's address so the device answers ARP for those hosts.