Listing iptables rules numerically | LinuC Level 1 102 Exam original practice question

1.10.2Basic

List current filter-table rules without name resolution and include packet and byte counters.

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.

Detailed explanation

Incorrectiptables -F -n -v

Incorrect. -F flushes rules.

Correctiptables -L -n -v

Correct. It lists numeric rules with counters.

Incorrectiptables -A -n -v

Incorrect. -A appends a rule.

Incorrectiptables -D -n -v

Incorrect. -D deletes a rule.

An example you can run in a temporary verification environment.

iptables --help 2>&1 | grep -E -- '^-L|--list|^-n|^-v' | head -n 4

list、numeric、verboseに関するhelp行

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 IDKL-102-1146

Environmentiptables help / ルール変更なし

Last technical review2026-08-20