問63
頻出度★★★
チェーンメールの特徴として，適切なものだけを全て挙げたものはどれか。 a グループ内の連絡や情報共有目的で利用される。 b ネットワークやサーバに，無駄な負荷をかける。 c 返信に対する返信を，お互いに何度も繰り返す。 d 本文中に，多数への転送を煽る文言が記されている。
令和元年度 秋期 ITパスポート試験 問63
テクノロジ系セキュリティ › 情報セキュリティ
This question's explanation and your answers so far.
解説
問 63
Incorrectア
The combination “a, c”. Item a, “used for the purpose of contacting members within a group or sharing information,” is the use of an ordinary group email and is not a characteristic of chain mail. Item c, “replies to replies repeated back and forth,” merely describes an ordinary back-and-forth exchange of email and is not a characteristic of chain mail, whose essence is forwarding to an unspecified large number of people. Since neither applies, it is incorrect.
Incorrectイ
The combination “a, d”. Item d (wording that incites forwarding to many people) is correct as a characteristic of chain mail, but item a (the purpose of contacting members within a group or sharing information) is the use of an ordinary group email and is not a characteristic of chain mail. Because it includes the incorrect item a, it fails the condition of listing only all of the appropriate items and is therefore inappropriate.
Incorrectウ
The combination “b, c”. Item b (placing a needless load on networks and servers) is correct as a characteristic of chain mail, but item c (replies to replies repeated back and forth) describes an ordinary back-and-forth exchange of email and is not a characteristic of chain mail. Because it includes the incorrect item c, it is inappropriate.
- エ
正解 The correct answer is “エ” (b, d). Chain mail refers to email whose body contains wording that incites forwarding to an unspecified large number of people (d), such as “forward this to N people,” and which multiplies in a chain reaction as each recipient keeps forwarding it. This chained mass forwarding places a needless load on networks and mail servers (b), which is its typical harm. Therefore only b and d match the characteristics of chain mail, and their combination “エ” is correct.
ここがポイント
- The essential characteristics of chain mail are that it contains wording that incites forwarding to an unspecified large number of people (d), and that through chained mass forwarding it places a needless load on networks and servers (b).
- Distinguish that contacting members within a group and sharing information (a) is an ordinary email use, and back-and-forth replies (c) are just an ordinary exchange — neither is a characteristic unique to chain mail.
用語