Which of the following address ranges is reserved for private networks according to IANA?

• A. 10.0.0.0/8
• B. 172.16.0.0/12
• C. 192.168.0.0/16
• D. All of the above

Answer: (D)

Private IPv4 address blocks are reserved by IANA for internal networks and are not routable on the public Internet. This allows internal addressing to be reused across different sites, typically with NAT translating internal addresses when accessing the Internet. The blocks designated for private use are 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. Since each of these ranges is for private networks, all of the ranges listed are private-use addresses.