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200-901 Network Fundamentals Practice Question

Which IP address is a valid host address in the 192.168.1.0/24 network?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

192.168.1.128

/24 means subnet mask 255.255.255.0. Network address is 192.168.1.0, broadcast is 192.168.1.255. Usable hosts range from .1 to .254.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • 192.168.1.128

    Why this is correct

    192.168.1.128 is within the usable range 1-254.

  • 192.168.2.1

    Why it's wrong here

    This is in a different subnet (192.168.2.0/24).

  • 192.168.1.255

    Why it's wrong here

    This is the broadcast address.

  • 192.168.1.0

    Why it's wrong here

    This is the network address, not a host address.

Visual reference

192.168.1.0 /24 256 addresses (254 usable) 192.168.1.0 /25 Subnet A 128 addr (126 usable) 192.168.1.128 /25 Subnet B 128 addr (126 usable) Borrowing 1 bit from host portion creates 2 subnets (/25)

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JA

Written by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This 200-901 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 200-901 exam.