Computer Science

IP Address Classes

Identify class of an IPv4 address.

A: 1-126, B: 128-191, C: 192-223

Formula Explanation

First octet determines the class of the address.

Variables Explained

Class A, B, C are for unicast.

Solved Example

What class is 172.16.0.1?
Class B.

Exam Tip

127 is reserved for loopback.