Which two reasons justify implementing private IPv4 addressing? (Choose two.)

Private IPv4 addressing, defined in RFC 1918, allows organizations to use specific address ranges (e.g., 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) internally without needing globally unique addresses. This directly helps to conserve IPv4 address space, as these addresses are not routed on the public internet and can be reused by countless organizations. Additionally, because private IP addresses are not directly reachable from the internet, they inherently reduce the risk of a security breach by making internal hosts less susceptible to direct attacks from external sources. While Network Address Translation (NAT) is often used with private addressing, it's the private addressing itself that provides the initial layer of isolation. PCI regulations and local laws do not specifically mandate private IPv4 addressing, and while private addressing can indirectly affect router forwarding tables by reducing the need for public routes for internal networks, its primary justification isn't router table size reduction.