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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212
関連用語
用語に関連する話
用語の使用例
ファイアウォール
不正な通 信を遮断する
イン タ ー ネ ットと 社 内 ネ ット ワ ー ク の 境 界 に 設 置 し て 、 社 内 ネ ット ワ ー ク の 門 番 の 役 割 を 担 う
ネットワーク機 器 をファイアウォールと言う。通 信 デ ータを 監 視し、あらかじめ 決 めた ルー ル
によって、データの転送を許 可 するかどうかを決 めることで、外部からの 通 信を遮 断 する
だけでなく、外部に向けての通信も遮断できる。
多様な製品の登場
通信の宛先として記述された情
報だけで可否を判断する製品も
あれば、通信内容の中身まで詳し
く検査する製品もある。OSが簡
易機能を備える場合もある。
緩衝地帯のDMZ
ネットワークを分割する際、イ
ンターネットと内部ネットワー
クの中間に位置する領域として
DMZがあり、緩衝地帯としての
役割を果たす。
IDSとIPS
外部からの攻撃を検知する監視
カメラのような役割を果たす機
器にIDS があり、不正な侵入を遮
断する機能を備えた機器にIPS
がある。
Keyword
189
▶
ふ ぁ い あ うぉ ー る
「外部からの攻撃を防ぐにはファイアウォールの設定が必要だね。」
不正アクセス
……P195
パ ケットフィル タリン グ
……P209
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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.