平成27年度秋期 ITパスポート試験問78

This question's explanation and your answers so far.

問78

頻出度★★★

一度に複数の相手に電子メールを送信するとき, 電子メールを受け取った相手が自分以外の受信者のメールアドレスを知ることがないようにしたい。このとき, 送信したい複数の相手のメールアドレスを記述する場所として適切なものはどれか。

出典　平成27年度秋期 ITパスポート試験問78

解説

問 78

ア
正解 The correct answer is “ア”, Bcc. Bcc stands for Blind Carbon Copy; the email addresses entered in this field are not shown to any other recipient. Therefore, if you place multiple recipients in the Bcc field and send them all at once, each recipient cannot learn the addresses of the others, which satisfies the requirement in the question (keeping recipients' addresses hidden from one another in a broadcast email).
Incorrectイ
Cc stands for Carbon Copy; all addresses entered in the Cc field are shown to every recipient, including those in To. As a result, recipients can see one another's addresses, so it does not meet the secrecy requirement.
Incorrectウ
To is the primary recipient field, and all addresses entered there are shown to every recipient. Placing multiple addresses in To makes them visible to one another, which violates the requirement.
Incorrectエ
Even if you split the addresses between both To and Bcc, the addresses placed in the To field are still shown to every recipient. Because even a portion of the addresses is exposed, it does not meet the requirement of hiding everyone's addresses.

ここがポイント

The difference among the email address fields To, Cc, and Bcc: addresses entered in To and Cc are shown to all recipients, whereas addresses entered in Bcc are not shown to the other recipients.
For broadcast emails where you do not want recipients to know one another's email addresses, entering the recipients in the Bcc field is the standard practice.

用語

解答問78ア