The correct answer is 192.168.1.10, as it falls within the RFC 1918 private IP address range of 192.168.0.0/16, which is reserved exclusively for internal local area networks. Private IP address ranges are defined by RFC 1918 to prevent conflicts with public internet addresses, and they include 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16—the latter being the most common for home and small office setups. On the CompTIA A+ Core 1 220-1201 exam, you will often see a scenario where a router’s WAN port gets a public IP from the ISP, and you must identify which LAN address is validly private; a common trap is confusing the 172.16.0.0/12 range with the public 172.x.x.x addresses or forgetting that 192.168.0.0/16 covers all addresses from 192.168.0.0 to 192.168.255.255. To remember the three ranges, think of the mnemonic “10, 172, 192” in ascending order, and note that 192.168 is the only one starting with 192—easy to spot on the exam.
220-1201 IP Addressing Practice Question
This 220-1201 practice question tests your understanding of ip addressing. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A technician is setting up a small network for a home office. The router's WAN port receives a public IP of 203.0.113.5 from the ISP. The technician configures the LAN with a private IP range. Which of the following is a valid private IP address for the technician to assign to a workstation?
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
Private IP addresses are defined in RFC 1918: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. 192.168.1.10 falls within the 192.168.0.0/16 range, making it a valid private address for LAN use.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
172.32.1.10
Why it's wrong here
Incorrect. 172.32.1.10 is not in the private range (172.16.0.0 to 172.31.255.255). It is a public address.
✓
192.168.1.10
Why this is correct
Correct. 192.168.1.10 is within the private 192.168.0.0/16 range and is commonly used for LANs.
Related concept
Read the scenario before looking for a memorised answer.
✗
203.0.113.10
Why it's wrong here
Incorrect. 203.0.113.10 is a public IP address (often used for documentation) and should not be used on a private LAN.
✗
169.254.1.10
Why it's wrong here
Incorrect. 169.254.1.10 is an APIPA address, used only when DHCP fails, not for static assignment.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1201 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1201 question in full detail.
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
IP Addressing — This question tests IP Addressing — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 192.168.1.10 — Private IP addresses are defined in RFC 1918: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. 192.168.1.10 falls within the 192.168.0.0/16 range, making it a valid private address for LAN use.
What should I do if I get this 220-1201 question wrong?
Identify which 220-1201 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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