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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56
関連用語
用語に関連する話
用語の使用例
I P アドレ スと ポ ート 番 号
IPv4アドレス
コンピュータを区別するために
付けられた32ビットの値で、8ビッ
トずつ区切って「192.168.1.2」の
ように10進法で表現されること
が多い。
IPv6アドレス
IPv4で割り当てられるアドレス
が不足する問題を解消するため
に作られた128ビットの値で、
「2001:0:9d38:6ab8:3457:7bbb:8
897:a7」のように表現される。
ウェル ノウン ポ ート
著名なサービスが使うために予
約されている0〜1023番のポート
番号で、Web サーバーは80番、メー
ルサーバーは25番のように決め
られている。
ネットワークにおける場 所を 表す 番 号
ネットワークに接 続しているコンピュータの 場 所を識 別 するために、個々のコンピュータに付
与されるの が I P アドレス（ 場 所 ）で ある。また 、1 つ のコンピュータで We b サーバーやメー
ルサーバーなど複数のサービスが動作している場合、その中から利用するサービスを識別
して接 続 するために、各 サービスにはポート番 号 が 割り当てられている。
▶
あ い ぴ ーあど れ す
▶
ぽ ーとば ん ごう
Keyword
041
「インターネットに繋がらないなら、IPアドレスが正しいか確認してみてね。」
ドメイン名とDNS
……P57
TCPとUDP
……P60
NATとNAPT
……P62
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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.