June 2018
Beginner to intermediate
424 pages
5h 59m
Japanese
Content preview from 実践 パケット解析 第3版 ―Wiresharkを使ったトラブルシューティング
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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.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.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.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.
付録Bパケットを知る
この付録では、パケットの表示方法を見ていきます。パケットを解読して16進数で表す方法に加え、パケット構造図を使ってパケットの値を読み、参照する方法を説明します。
パケットデータを解読するソフトウェアは豊富にあるので、この付録に掲載した情報を理解しなくても、パケットをキャプチャし、解析することができます。しかしパケットデータとその構造について学んでおけば、Wiresharkなどのツールが提供する内容をさらによく理解できるでしょう。解析するデータは曖昧でないほうがいいに決まっています。
B.1 パケット表示
パケットを解読できるよう表示する方法は数多くあります。生のパケットデータは、次のような1と0を組み合わせたバイナリつまり2進法で表示されます。
0100010100000000000000000011010001000000111100100100000000000000 1000000000000110010100110101110010101100000100000001000010000000 0100101001111101010111110110100000000110010001100000000001010000 0111110000100011010110101011011100000000000000000000000000000000 1000000000000010001000000000000000001011001100000000000000000000 0000001000000100000001011011001000000001000000110000001100000010 00000001000000010000010000000010 ...
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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.