IPv4 Quiz: Can You Master Classes, CIDR & Subnet Masks?

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Quizzes Created: 11589 | Total Attempts: 157,024
| Attempts: 12 | Questions: 20 | Updated: Jul 2, 2026
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1. What is the default subnet mask for a Class C IPv4 address?

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About This Quiz
Ipv4 Quiz: Can You Master Classes, Cidr & Subnet Masks? - Quiz

Test your understanding of IPv4 Addressing (Network+) fundamentals, including classful and classless addressing, CIDR notation, and subnet mask calculations. This quiz evaluates your ability to work with IP address classes, determine network and host bits, and apply subnetting techniques\u2014essential skills for network administrators and CompTIA Network+ certification candidates.

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2. Which IPv4 address class is reserved for multicast traffic?

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3. How many usable host addresses are in a /28 subnet?

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4. What is the broadcast address for the subnet 172.16.10.0/24?

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5. A Class B address begins with which octet range?

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6. What is the maximum number of subnets created by a /26 mask on a Class C network?

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7. CIDR notation /25 equals the subnet mask ____.

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8. The last usable host address in 10.0.0.0/24 is ____.

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9. A /32 subnet mask in dotted decimal notation is ____.

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10. The subnet mask 255.255.255.240 provides how many usable hosts per subnet?

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11. Which of the following is NOT a reserved private IPv4 range?

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12. How many bits are available for host addresses in a /30 subnet?

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13. What is the first usable host address in the 192.168.1.0/27 subnet?

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14. Which address is the network address for 10.20.30.100/22?

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15. Convert the subnet mask 255.255.248.0 to CIDR notation.

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16. Which subnet mask allows for 254 usable host addresses?

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17. Which of the following is a valid private IPv4 address range?

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18. In IPv4 addressing, the loopback address range is ____.

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19. What is the network address for 192.168.5.130/25?

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20. In CIDR notation, what does /24 represent?

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What is the default subnet mask for a Class C IPv4 address?
Which IPv4 address class is reserved for multicast traffic?
How many usable host addresses are in a /28 subnet?
What is the broadcast address for the subnet 172.16.10.0/24?
A Class B address begins with which octet range?
What is the maximum number of subnets created by a /26 mask on a Class...
CIDR notation /25 equals the subnet mask ____.
The last usable host address in 10.0.0.0/24 is ____.
A /32 subnet mask in dotted decimal notation is ____.
The subnet mask 255.255.255.240 provides how many usable hosts per...
Which of the following is NOT a reserved private IPv4 range?
How many bits are available for host addresses in a /30 subnet?
What is the first usable host address in the 192.168.1.0/27 subnet?
Which address is the network address for 10.20.30.100/22?
Convert the subnet mask 255.255.248.0 to CIDR notation.
Which subnet mask allows for 254 usable host addresses?
Which of the following is a valid private IPv4 address range?
In IPv4 addressing, the loopback address range is ____.
What is the network address for 192.168.5.130/25?
In CIDR notation, what does /24 represent?
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