Which of the following addresses is a class B private address?

The correct answer is D. 172.23.226.34. RFC 1918 defines three private IP address ranges: Class A: 10.0.0.0/8, Class B: 172.16.0.0/12 (covers 172.16.0.0 – 172.31.255.255), and Class C: 192.168.0.0/16. The only answer that falls within the Class B private range (172.16–172.31) is 172.23.226.34. Addresses 132.x, 152.x…

Networking concepts

Question

Options

A132.216.14.184
B152.119.25.213
C162.17.43.22
D172.23.226.34

How the community answered

(37 responses)

A
3% (1)
B
5% (2)
C
3% (1)
D
89% (33)

Explanation

RFC 1918 defines three private IP address ranges: Class A: 10.0.0.0/8, Class B: 172.16.0.0/12 (covers 172.16.0.0 – 172.31.255.255), and Class C: 192.168.0.0/16. The only answer that falls within the Class B private range (172.16–172.31) is 172.23.226.34. Addresses 132.x, 152.x, and 162.x are in the Class B public range - they are routable on the internet and not private addresses. 172.23.x.x is within 172.16.0.0/12, confirming it is a Class B private address.

Topics

#private IP addresses#Class B#RFC 1918#IPv4

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