Which of the following TCP/IP addresses is a Class B address?

The correct answer is C. 172.16.32.1. Classful IP addressing divides the IPv4 space by the value of the first octet: Class A covers 1–126 (e.g., 10.x.x.x and 15.x.x.x), Class B covers 128–191 (e.g., 172.x.x.x), and Class C covers 192–223 (e.g., 192.x.x.x). Since 172 falls in the 128–191 range, 172.16.32.1 is a…

Networking

Question

Options

A10.0.0.1
B15.10.1.1
C172.16.32.1
D192.168.5.5

How the community answered

(50 responses)

A
2% (1)
B
6% (3)
C
90% (45)
D
2% (1)

Explanation

Classful IP addressing divides the IPv4 space by the value of the first octet: Class A covers 1–126 (e.g., 10.x.x.x and 15.x.x.x), Class B covers 128–191 (e.g., 172.x.x.x), and Class C covers 192–223 (e.g., 192.x.x.x). Since 172 falls in the 128–191 range, 172.16.32.1 is a Class B address. Option A (10.0.0.1) and B (15.10.1.1) are Class A, and option D (192.168.5.5) is Class C.

Topics

#IP addressing#Class B#TCP/IP#classful networking

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