200-901 Network Fundamentals Practice Question
Which of the following is a private IPv4 address range as defined by RFC 1918?
⚠ Common exam trap
Cisco often tests the exact boundaries of RFC 1918 ranges, and the trap here is confusing the 172.16.0.0/12 range with the broader 172.0.0.0/8, leading candidates to select 172.32.0.0/16 as a valid private range.
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
✓
10.0.0.0/8
(10.0.0.0/8) is correct because RFC 1918 reserves this range, along with 172.16.0.0/12 and 192.168.0.0/16, for private IPv4 addressing. These addresses are not routable on the public internet and are intended for use within private networks, such as corporate LANs or home networks.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
169.254.0.0/16
Why it's wrong here
169.254.0.0/16 is link-local, not private.
- ✗
192.167.0.0/16
Why it's wrong here
192.167.0.0 is not private; private is 192.168.0.0/16.
- ✓
10.0.0.0/8
Why this is correct
10.0.0.0/8 is a private IP range.
- ✗
172.32.0.0/16
Why it's wrong here
172.32.0.0 is not in the 172.16.0.0/12 range.
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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.