問59
頻出度★★★
電子メールに関する記述として, 適切なものだけを全て挙げたものはどれか。 a 電子メールのプロトコルには, 受信に SMTP, 送信に POP3 が使われる。 b メーリングリストによる電子メールを受信すると, その宛先には全ての登録メンバのメールアドレスが記述されている。 c メール転送機能を利用すると, 自分名義の複数のメールアドレス宛に届いた電子メールを一つのメールボックスに保存することができる。
平成30年度 春期 ITパスポート試験 問59
テクノロジ系ネットワーク › ネットワーク応用
This question's explanation and your answers so far.
解説
問 59
Incorrectア
This lists only a, but a is wrong. In email protocols, the correct usage is SMTP for sending and POP3 (or IMAP) for receiving, whereas statement a reverses sending and receiving. Since the only correct statement is c, choosing ア, which lists only a, is inappropriate.
Incorrectイ
This lists a and c; although c is correct, a is wrong (SMTP for sending and POP3 for receiving are reversed). Because it includes the incorrect statement a, it fails the condition of listing all and only the correct statements, so it is inappropriate.
Incorrectウ
This lists only b, but b is wrong. When you send to a mailing list, the email arrives at a single list address and the server distributes it to each registered member; the recipient field of the received email does not list all members' addresses. Therefore choosing ウ, which selects b, is inappropriate.
- エ
正解 The correct answer is エ (c only). Statement c is correct. With the mail forwarding feature, emails sent to several email addresses under your own name can be forwarded and saved together into one designated mailbox. Therefore the option that lists all and only the correct statements is c alone, so エ, which selects c, is the correct answer. Note that a reverses the send and receive protocols (correctly, SMTP is used for sending and POP3 for receiving) and is wrong, and b is wrong because a mailing list does not list each member's address in the recipient field, so the only correct statement is c.
ここがポイント
- The basic email protocols are SMTP for sending and POP3 (or IMAP) for receiving. Be careful not to mix up sending and receiving as statement a does.
- A mailing list works by sending to one representative address, after which the server distributes it to each member, so the recipient field does not expose everyone's addresses; the mail forwarding feature can consolidate emails sent to multiple addresses into a single mailbox.
用語