SSCP Question #1061: Real Exam Question with Answer & Explanation

The correct answer is B: a class B network.. Before the advent of classless addressing, one could tell the size of a network by the first few bits of an IP address. If the first bit was set to zero (the first byte being from 0 to 127), the address was a class A network. Values from 128 to 191 were used for class B networks

Submitted by skyler.x· Apr 18, 2026Network and Communications Security

Question

Before the advent of classless addressing, the address 128.192.168.16 would have been considered part of:

Options

Aa class A network.
Ba class B network.
Ca class C network.
Da class D network.

Explanation

Before the advent of classless addressing, one could tell the size of a network by the first few bits of an IP address. If the first bit was set to zero (the first byte being from 0 to 127), the address was a class A network. Values from 128 to 191 were used for class B networks whereas values between 192 and 223 were used for class C networks. Class D, with values from 224 to 239 (the first three bits set to one and the fourth to zero), was reserved for IP multicast.

Topics

#IP Addressing#Classful Addressing#IPv4#Network Basics

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