LFCS · Question #446
Which of the following Class B IPv4 networks are reserved by IANA for private address assignment and private routing? (Select TWO).
The correct answer is D. 172.16.0.0 E. 172.20.0.0. IANA reserves the IPv4 Class B range 172.16.0.0 through 172.31.255.255 (a /12 network) for private address assignment and routing within private networks.
Question
Options
- A128.0.0.0
- B169.16.0.0
- C169.254.0.0
- D172.16.0.0
- E172.20.0.0
How the community answered
(38 responses)- A3% (1)
- B5% (2)
- D92% (35)
Why each option
IANA reserves the IPv4 Class B range 172.16.0.0 through 172.31.255.255 (a /12 network) for private address assignment and routing within private networks.
`128.0.0.0` is a public IP address range and is not reserved for private use.
`169.16.0.0` is a public IP address range and is not reserved for private use.
`169.254.0.0` is the Automatic Private IP Addressing (APIPA) range, used for link-local addresses, but it is not one of the RFC 1918 private address ranges for general network routing.
The `172.16.0.0` network is part of the RFC 1918 private IPv4 address range `172.16.0.0` - `172.31.255.255` (a /12 prefix), which is reserved for private use and not routable on the public internet.
The `172.20.0.0` network also falls within the RFC 1918 private IPv4 address range `172.16.0.0` - `172.31.255.255` (a /12 prefix), designated for private networks.
Concept tested: RFC 1918 Private IP Address Ranges (Class B)
Source: https://datatracker.ietf.org/doc/html/rfc1918
Topics
Community Discussion
No community discussion yet for this question.