フリー問題

問題文

One rule with no from-zone and no to-zone is added next to the existing zone-pair rules. Which pair states where in the lookup order that rule is reached and what it is against traffic that one zone-pair rule has already matched?

選択肢

1. That zoneless rule joins the lookup in one descending pass and stays nonbinding with that arrangement.
2. That zoneless rule joins the lookup in one descending pass and stays enforceable with that arrangement.
3. That zoneless rule joins the lookup in one tertiary pass and stays enforceable with that arrangement.
4. That zoneless rule joins the lookup in one tertiary pass and stays nonbinding with that arrangement.