LFCS · Question #51
Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)
The correct answer is B. 10.0.0.0/8 D. 172.16.0.0/12 E. 192.168.0.0/16. This question identifies the three IPv4 address ranges reserved by IANA (RFC 1918) for private network assignments and private routing, which are not globally routable.
Question
Options
- A127.0.0.0/8
- B10.0.0.0/8
- C169.255.0.0/16
- D172.16.0.0/12
- E192.168.0.0/16
How the community answered
(38 responses)- A8% (3)
- B89% (34)
- C3% (1)
Why each option
This question identifies the three IPv4 address ranges reserved by IANA (RFC 1918) for private network assignments and private routing, which are not globally routable.
127.0.0.0/8 is reserved for loopback addresses (e.g., 127.0.0.1) and is not used for general private network assignment.
The 10.0.0.0/8 network is one of the three designated private address ranges, offering a large block of addresses suitable for large organizations.
169.254.0.0/16 (not 169.255.0.0/16 as specified in choice C, but close enough to address the intent) is reserved for Automatic Private IP Addressing (APIPA) or link-local addresses, used when a DHCP server is unavailable, and is not an RFC 1918 private range.
The 172.16.0.0/12 network is another RFC 1918 private address range, providing a mid-sized block of addresses.
The 192.168.0.0/16 network is the third RFC 1918 private address range, commonly used for smaller networks like home or small office environments.
Concept tested: IPv4 private address ranges (RFC 1918)
Source: https://datatracker.ietf.org/doc/html/rfc1918
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