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[root@localhost ~]# arp -n
'''2. What command disable ARP on a network interface?'''
Answer: To disable ARP on a network interface named 'ethxxx', one would use a command of the form 'ifconfing ethxxx -arp'.
'''How do you enable ARP on a network interface if it has been disabled?''' Answer: To disable re-enable ARP on a network interface named 'ethxxx', one would use a command of the form 'ifconfing ifconfig ethxxx -arp'.