問87
頻出度★★☆
メールサーバから電子メールを受信するためのプロトコルの一つであり, 次の特徴をもつものはどれか。 ① メール情報を PC 内のメールボックスに取り込んで管理する必要がなく, メールサーバ上に複数のフォルダで構成されたメールボックスを作成してメール情報を管理できる。 ② PC やスマートフォンなど使用する端末が違っても, 同一のメールボックスのメール情報を参照, 管理できる。
令和4年度 ITパスポート試験 問87
テクノロジ系ネットワーク › 通信プロトコル
This question's explanation and your answers so far.
解説
問 87
- ア
正解 The correct answer is 'ア', IMAP. IMAP (Internet Message Access Protocol) is a protocol for receiving email from a mail server, and its distinctive feature is that it keeps and manages email on the server. Characteristic (1) 'without downloading into the PC, a mailbox composed of multiple folders can be created on the server to manage the mail' and characteristic (2) 'even when the device used differs, such as a PC or a smartphone, the mail in the same mailbox can be viewed and managed' are both exactly the nature of IMAP, which manages email centrally on the server side. Therefore 'ア' is correct.
Incorrectイ
NTP (Network Time Protocol) is a protocol that synchronizes the time of devices over a network; it has nothing to do with receiving email.
Incorrectウ
SMTP (Simple Mail Transfer Protocol) is a protocol for sending and relaying email, not for receiving and then viewing or managing it. The question asks for a 'protocol for receiving', so it does not fit.
Incorrectエ
WPA (Wi-Fi Protected Access) is an encryption and security standard for wireless LAN, not an email protocol.
ここがポイント
- The difference between email-receiving protocols: POP downloads email to the PC to manage it, whereas IMAP manages email on the server, allowing a multi-folder structure and viewing of the same mailbox from multiple devices.
- Sorting out the roles of email-related protocols: SMTP for sending, POP / IMAP for receiving. NTP is for time synchronization and WPA is for wireless LAN security, so their purposes are entirely different.
用語