Private IP addresses are used within private networks and are not unique globally. They can be reused in different private networks without conflict. Non-unique Addresses: Private IP addresses do not have to be unique globally, allowing them to be reused in different networks. Repetition in Local Networks: They can be repeated within different local networks as they are not routable on the public Internet. Options C and D correctly describe properties of private IP addresses. Reference: Cisco DevNet Documentation: Private vs. Public IP Addresses