May 2019
Beginner to intermediate
296 pages
6h 58m
Japanese
Content preview from IT用語図鑑 ビジネスで使える厳選キーワード256
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187
5
関連用語
用語に関連する話
用語の使用例
DoS
攻撃
高負荷な状 態を 作り出す
一時的に大量の通信を発生させることにより、対象のネットワークを麻痺させてしまう攻撃
を DoS 攻撃やサービス拒否攻撃と言う。「いたずら電話がたくさんかかってきて、必要な
電 話に出られ ない 状 態 」に似ている。D oS 攻 撃 は 1 台 のコンピュータからの 攻 撃 だが 、
多 数 のコンピュータが 1 台 のコンピュータに 攻 撃を 行うことは 特 に D D o S 攻 撃と言う。
DoS攻撃の判断は難しい
システムによって普段の負荷は
異なるため、正常な通信と同じ手
法で負荷だけ高まった場合、どの
レベルを攻撃と判断するのかは
難しい。
安価な攻撃ツールの登場
DoS攻撃には多くの PC が必要だ
と思われるが、すでに乗っ取られ
たPCを操作できるツールも登場
しており、簡単に攻撃できる状況
が整いつつある。
WebブラウザでのF5攻撃
Webブラウザでページの再読み
込みを行うときにF5キーを押す
ことから、何度もF5を押してサー
バーに負荷をかけることをF5攻
撃と言う。
Keyword
164
▶
ど す こうげ き
「サーバーがDoS攻撃を受けてダウンしちゃったけどどうしよう？」
サイバー犯罪
……P194
不 正 アクセ ス
……P195
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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.