フリー問題

問題文

Mail addressed to one local account on a FreeBSD host must also reach a second local account. The administrator adds a line to the alias list. What has to be done afterwards, and why?

選択肢

1. The delivery agent on this host reads the compiled database rather than the text file that a person edits so after every change the administrator has to run the configuration reload that rebuilds it.
2. The delivery agent on this host reads the compiled database rather than the text file that a person edits so after every change the administrator has to run the newaliases command that rebuilds it.
3. The delivery agent on this host reads the spooled queue rather than the text file that a person edits so after every change the administrator has to run the newaliases command that rebuilds it.
4. The delivery agent on this host reads the spooled queue rather than the text file that a person edits so after every change the administrator has to run the configuration reload that rebuilds it.