Inspecting systemd-resolved DNS state | LPIC-1 102-500 Exam original practice question

109.4Standard

On a system using systemd-resolved, list global and per-link DNS servers, search domains, and protocol status.

Do not change the configuration.

Which command 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.

resolvectl dns enp1s0 192.0.2.53: Incorrect. It changes the per-link DNS server.
resolvectl revert enp1s0: Incorrect. It restores the per-link configuration to defaults.
resolvectl status: Correct. It displays global and per-link resolver state.
resolvectl flush-caches: Incorrect. It clears the local DNS cache.

Detailed explanation

Incorrectresolvectl dns enp1s0 192.0.2.53

Incorrect. It changes the per-link DNS server.

Incorrectresolvectl revert enp1s0

Incorrect. It restores the per-link configuration to defaults.

Correctresolvectl status

Correct. It displays global and per-link resolver state.

Incorrectresolvectl flush-caches

Incorrect. It clears the local DNS cache.

An example you can run in a temporary verification environment.

printf '%s
' 'resolvectl status -> global and per-link DNS state'

resolvectl status -> global and per-link DNS state

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-109-841

Environmentsystemd resolvectlの操作対応表

Last technical review2026-08-13