109.1Standard
Use an ordinary unicast IPv4 subnet 192.0.2.0/24 and do not assign the network or directed-broadcast addresses.
How many host addresses are available?
× Incorrect
A /24 has 256 addresses; subtracting network and broadcast leaves 254 usable host addresses.
Detailed explanation
Correct
254Correct. 256 minus network and broadcast equals 254.
Incorrect
256Incorrect. It includes the two reserved addresses.
Incorrect
252Incorrect. A /24 does not reserve four addresses.
Incorrect
24Incorrect. The prefix length is not the host count.
Try it yourself
An example you can run in a temporary verification environment.
python3 -c "import ipaddress; n=ipaddress.ip_network('192.0.2.0/24'); print(n.num_addresses-2)"Expected result
254Key points
- 8 host bits
- 256 total
- Subtract two reserved addresses
Notes
- Environment: Python 3 ipaddress
- Command output formatting can vary slightly by distribution or tool version.
- Run the example in a temporary directory or process when possible.
Foundation review
Read the scope first
Check whether the command acts on the current shell, a new process, an existing process, or a file.
Verify the observable result
Use the supplied command and compare the output with the expected result.
Question IDKP-109-773
EnvironmentPython 3 ipaddress
Last technical review2026-08-13
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