フリー問題

問題文

Some of the destinations that sit outside the cluster are checked for validity before use. Against what does the guide say that check is made?

選択肢

1. The search space that the calling party holds for its own calls, since the ones entered upon the administration pages are left out of the check.
2. The dial plan that the desktop client holds for its users, since the ones entered upon the administration pages are left out of the check.
3. The search space that the remote device holds for rerouting, since the ones entered upon the administration pages are left out of the check.
4. The dial rules that the application holds for numbers, since the ones entered upon the administration pages are left out of the check.