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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55
関連用語
用語に関連する話
用語の使用例
2
I
T
プロトコ ルと
O S I 参 照モデル
「OSI参照モデルは理想的だけど、現実的なプロトコルはTCP/IPかな。」
階層化するメリット
各階層で処理を役割分担するこ
とで、それぞれの処理内容を単純
化できるだけでなく、通信の内容
に合わせてアプリがプロトコル
の組み合わせを選択できる。
TCP/IPの特徴
TCPや IPといったプロトコルを
使う構成の総称を TCP/IP と言い、
4つの階層で役割を分担すること
で、効率的に実装でき、現実的な
仕様だと言える。
パケットを中継するIP
複数のネットワークを接続する
とき、経路選択やパケットの分割・
再構築を行うなど、ネットワーク
間での通信方法を規定している
プロトコルにIP がある。
通信の合い言葉
ネットワークに接続した端末同士がやり取りするには、通信の規約（ルール）が必要でプ
ロトコルと言う。プロトコルの基本的な考えに7 つの階層に分けたOSI 参照モデルがある。
インターネットでは TCP/IPという4 つの階層に分けたプロトコルが使われている。
▶
ぷ ろとこる
▶
お ー え す あ い さ ん しょうも で る
Keyword
040
IP アドレスとポート番号
……P56
TCPとUDP
……P60
SMTP と POP、IMAP
……P87
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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.