February 2024
Beginner to intermediate
304 pages
9h 13m
Japanese
Content preview from 実務で使える メール技術の教科書 基本のしくみからプロトコル・サーバー構築・送信ドメイン認証・添付ファイル・暗号化・セキュリティ対策まで
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APOP で使われる技術として正しいものはどれか。
A）公開鍵暗号 B）共通鍵暗号 C）ハッシュ D）デジタル署名
A）メールの送信元や宛先のメールアドレスも暗号化できる
B）既存のメールのプロトコルを使うためポート番号の変更が不要で
ある
C）添付ファイルをファイル共有サービスに格納することでメール
の容量が減る
D）宛先のメールサーバーと直接接続することで、高速に通信できる
STARTTLS を使うメリットとして正しいものはどれか。
A）認証局で発行された証明書を使って暗号や署名を実現している
B）メール本文を公開鍵暗号で暗号化している
C）メールを送信するときには宛先の公開鍵を知っている必要がある
D）友人の公開鍵にデジタル署名することで信頼関係を構築できる
S/MIME の特徴として正しいものはどれか。
A）通常の DNS とは異なるポート番号を使用する
B）通常の DNS とは別のサーバーを用意する必要がある
C）DNS サーバーとの問い合わせや応答などのやり取りが暗号化さ
れる
D）正しい相手からの応答であることと、データが改ざんされてい
ないことを保証できる
DNSSEC について正しい記述はどれか。
正解）Q1：C、Q2：B、Q3：A、Q4：D
Let's learn about email technology!
266
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.