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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35
1
I
T
関連用語
用語に関連する話
用語の使用例
ベ スト エ フォート
通信回線の契約に必須
利用者が最良の結果を得られるように事業者が努力すること。通信事業者がベストエ
フォートと言う場合、「表記されている速度は現実的には保証できないが 、それに近づける
ように努力する」という意味がある。コンピュータや中継機器の性能や設定、同時に使用
する台数などによって通信速度は変わるため、記載の速度が出ることはほぼない。
「ベストエフォートだから思ったほど速度が出ないんだよね。」
ADSLでの速度低下
ADSLは電話回線を使用するイン
ターネット接続方法。送信と受信
の通信速度が違うという特徴が
ある。収容局からの距離が離れる
と通信速度が低下する。
ベストエフォートの対義語
対義語はギャランティ型と言わ
れ、契約速度を保証すること。ア
クセス集中などによる速度低下
を避けるため、専用線を引いてい
る企業などもある。
通信回線の最後の区間
通信事業者から利用者の建物に引
かれる回線区間の最後をラストワ
ンマイルと言う。建物の構造や立
地によって、ケーブルを建物内に
引き込めない場合もある。
ADSLと光ファイバー
……P53
ISP
……P198
Keyword
022
▶
べ すとえ ふぉ ーと
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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.