問84
頻出度★★☆
PC にメールソフトを新規にインストールした。その際に設定が必要となるプロトコルに該当するものはどれか。
令和3年度 ITパスポート試験 問84
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 84
Incorrectア
DNS is a name-resolution protocol that converts between domain names and IP addresses. It is configured automatically or centrally by the OS as a network-wide setting, and is not an item you set individually when newly installing an email client, so it is wrong.
Incorrectイ
FTP is a protocol for transferring files to and from a server, and has nothing to do with sending or receiving email. It is not one of the items configured in an email client, so it is wrong.
Incorrectウ
MIME is a standard for the format (encoding scheme) used to handle non-text data such as images and attachments in email. It is a mechanism the email client processes automatically and internally, not a protocol the user configures at installation, so it is wrong.
- エ
正解 Option エ, POP3 (Post Office Protocol version 3), is a protocol for receiving mail: it downloads the messages addressed to you that have arrived on the mail server into the inbox on your PC. When you newly install an email client, you must configure POP3 (for receiving) together with the incoming server name and port number, so that the client knows which account to fetch mail for and from which server. Therefore, the protocol that needs to be configured is option エ.
ここがポイント
- Receiving email uses POP3 (or IMAP) and sending uses SMTP. In the initial setup of an email client, you configure the protocols of the incoming and outgoing servers along with the server names and account.
- Distinguish clearly: DNS is for name resolution, FTP is for file transfer, and MIME is a format standard for the email body — none of them is a protocol for configuring email reception.
用語