Selecting the netmask for /27 | LPIC-1 102-500 Exam original practice question

109.1Standard

Convert IPv4 prefix length /27 to dotted-decimal netmask.

Which netmask is appropriate?

Hint 1: Focus on the requirement

Identify what must change and what must remain unchanged. Then choose the command whose scope matches that requirement.

Hint 2: Check each command's role

Separate commands that display information, change state, remove data, or affect a child process.

Detailed explanation

Incorrect255.255.255.0

Incorrect. 255.255.255.0 is /24.

Correct255.255.255.224

Correct. 255.255.255.224 is /27.

Incorrect255.255.255.240

Incorrect. 255.255.255.240 is /28.

Incorrect255.255.255.192

Incorrect. 255.255.255.192 is /26.

An example you can run in a temporary verification environment.

python3 -c "import ipaddress; print(ipaddress.ip_network('192.0.2.0/27').netmask)"

255.255.255.224

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDKP-109-774

EnvironmentPython 3 ipaddress

Last technical review2026-08-13