20+ practice questions focused on IP Addressing — one of the most tested topics on the CompTIA A+ Core 1 220-1201 exam. Each question includes a detailed explanation so you learn why the right answer is correct.
Start IP Addressing PracticeA technician is troubleshooting a network where two computers cannot communicate. Computer A has an IP of 192.168.1.10 with subnet mask 255.255.255.0. Computer B has an IP of 192.168.2.20 with subnet mask 255.255.255.0. Both are connected to the same switch. The switch is not configured with VLANs. Why can't the computers communicate?
Explanation: Even though both computers are on the same physical switch, they are on different logical subnets (192.168.1.0/24 and 192.168.2.0/24). Without a router to forward traffic between subnets, they cannot communicate directly.
A user complains that they cannot access a website by its domain name, but they can access it by typing the IP address directly. The user's computer is configured to obtain DNS automatically. What is the most likely issue?
Explanation: When a user can access a site by IP but not by domain name, it indicates a DNS resolution problem. The DNS server may be unreachable or not configured correctly.
A user reports that they can only access the internet intermittently. The technician runs ipconfig and sees an IPv4 address of 192.168.1.105 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The technician pings the gateway successfully, but pings to 8.8.8.8 fail. What is the most likely issue?
Explanation: Successful ping to the gateway indicates local network connectivity is fine. Failure to ping an external IP like 8.8.8.8 suggests the router is not forwarding traffic to the internet, possibly due to a WAN configuration issue or ISP problem.
A company has a network with the IP range 172.16.0.0/16. They need to create 8 separate subnets for different departments, each with at least 1000 usable hosts. What subnet mask should be used?
Explanation: To create 8 subnets from a /16 network, you need to borrow 3 bits (2^3=8 subnets). This gives a /19 subnet mask (255.255.224.0), which provides 8190 usable hosts per subnet (2^13-2), meeting the requirement of at least 1000 hosts.
A user reports that their laptop can connect to the internet when using a wired connection at home, but cannot connect to any network resources when using Wi-Fi at the office. The office uses DHCP with a scope of 192.168.10.0/24. The laptop's IP configuration shows an address of 169.254.15.22. What is the most likely cause of this issue?
Explanation: The address 169.254.x.x is an Automatic Private IP Addressing (APIPA) address, assigned when a DHCP server is unreachable. This indicates the laptop failed to obtain a valid IP from the office DHCP server, likely due to a connectivity or server issue.
+15 more IP Addressing questions available
Practice all IP Addressing questions1. Baseline your knowledge
Start with 10 questions to gauge your current understanding of IP Addressing. This tells you whether you need a concept refresher or just practice.
2. Review every explanation
For each question — right or wrong — read the full explanation. Understanding why an answer is correct is more valuable than knowing the answer itself.
3. Focus on exam traps
IP Addressing questions on the 220-1201 frequently use trap wording. Look for subtle differences in answers that test your precision, not just general knowledge.
4. Reach 80% consistently
Do repeated sessions until you score 80%+ three times in a row. Then move to mixed-mode practice to test cross-topic recall under realistic conditions.
The exact number varies per candidate. IP Addressing is tested as part of the CompTIA A+ Core 1 220-1201 blueprint. Practicing with targeted IP Addressing questions ensures you can handle any format or difficulty that appears.
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Difficulty is subjective, but IP Addressing is a high-priority exam concept tested in multiple ways — direct recall, scenario analysis, and command-output interpretation. Consistent practice is the best way to build confidence.
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