Identifying a private IPv4 address | LPIC-1 102-500 Exam original practice question

109.1Standard

Choose an RFC 1918 private address that is not directly routed on the Internet.

Which address is private?

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

Incorrect172.15.10.20

Incorrect. 172.15 is outside the 172.16/12 private range.

Incorrect192.0.2.25

Incorrect. 192.0.2.0/24 is a documentation range.

Incorrect198.51.100.8

Incorrect. 198.51.100.0/24 is a documentation range.

Correct172.20.10.20

Correct. 172.20 is within 172.16-31.

An example you can run in a temporary verification environment.

python3 -c "import ipaddress; print(ipaddress.ip_address('172.20.10.20').is_private)"

True

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-109-776

EnvironmentPython 3 ipaddress

Last technical review2026-08-13