FC0-U71 Private IPv4 Address Ranges Practice Question
A technician is troubleshooting a network issue and needs to identify the IP address of a device. Which of the following are private IPv4 addresses? (Select TWO).
⚠ Common exam trap
Many exam-takers confuse APIPA (169.254.x.x) with RFC 1918 private addresses, or mistakenly thinking that any non-routable address is private; candidates often select 169.254.1.1 as private when it is actually link-local.
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
✓
192.168.1.10
The 192.168.0.0/16 range is one of the three RFC 1918 private IPv4 address blocks reserved for internal networks. Option E (172.16.0.1) is also correct because the 172.16.0.0/12 range (172.16.0.0 through 172.31.255.255) is another RFC 1918 private address block. Option A (8.8.8.8) is a public address used by Google Public DNS, so it is not private. Option C (203.0.113.5) falls in 203.0.113.0/24, which is reserved for documentation and testing (RFC 5737), not private use. Option D (169.254.1.1) is in the 169.254.0.0/16 link-local range (APIPA), which is non-routable but distinct from RFC 1918 private addressing.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
8.8.8.8
Why it's wrong here
8.8.8.8 sits in the public routable space as Google Public DNS, outside the RFC 1918 ranges 10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16. It is tempting because it is a well-known address technicians use for connectivity testing, but reachability does not make an address private.
- ✓
192.168.1.10
Why this is correct
192.168.1.10 falls within the 192.168.0.0/16 block reserved by RFC 1918 for private internets, so it is never routed on the public internet. This satisfies the stem's requirement to identify a private IPv4 address, unlike publicly routable ranges such as 8.8.8.8.
- ✗
203.0.113.5
Why it's wrong here
203.0.113.5 falls in 203.0.113.0/24, reserved by RFC 5737 for documentation examples, not RFC 1918 private addressing. It is tempting because reserved documentation ranges are non-routable on the public internet, but non-routability differs from private addressing, so it is not a private IPv4 address.
- ✗
169.254.1.1
Why it's wrong here
169.254.1.1 lies in 169.254.0.0/16, the link-local range assigned by APIPA when DHCP fails, not an RFC 1918 private address. It is tempting because link-local addresses are non-routable and appear during troubleshooting, but the stem asks specifically for private IPv4 addressing.
- ✓
172.16.0.1
Why this is correct
172.16.0.1 falls within the 172.16.0.0/12 block reserved by RFC 1918 for private IPv4 addressing, so it is not routable on the public internet. This satisfies the requirement to identify a private address, alongside 10.0.0.0/8 and 192.168.0.0/16 ranges.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This FC0-U71 practice question is part of Courseiva's free CompTIA 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 FC0-U71 exam.