What does the term 'private IP address' mean, and which three ranges are defined as private by RFC 1918?

• A.Private IP addresses are ranges reserved for internal (non-internet) use. RFC 1918 defines: 10.0.0.0/8 (Class A), 172.16.0.0/12 (Class B, covers 172.16.0.0-172.31.255.255), and 192.168.0.0/16 (Class C). These are not routed on the public internet and require NAT for internet access
• B.RFC 1918 defines one private range: 192.168.0.0/24
• C.Private IPs are the same as APIPA (169.254.x.x) addresses, because a host falls back to one of them when a lease cannot be automatically obtained and the same block is handed out by the working group document that lists the internal ranges for site use on any private campus network
• D.Private IPs are encrypted addresses used within corporate VPNs only; IPv6 replaces ARP with IGMP snooping for neighbor address resolution. IPv6 dual stack means tunneling IPv6 packets inside IPv4 GRE headers on the same interface. Two hosts may share one IP address on a LAN if their MACs differ, since ARP disambiguates them