Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
パケットを覗いてみよう / Packet workshop for beginners
Search
Tomoyuki KOYAMA
March 16, 2018
Technology
0
340
パケットを覗いてみよう / Packet workshop for beginners
多摩科学技術高校 サイエンスワークショップ 2018/03/15-16
Tomoyuki KOYAMA
March 16, 2018
Tweet
Share
More Decks by Tomoyuki KOYAMA
See All by Tomoyuki KOYAMA
Reading HTTP Client Hints
tomoyk
0
88
Log message with JSON item count for root cause analysis in microservices
tomoyk
1
210
Distributed Log Search Based on Time Series Access and Service Relations
tomoyk
0
330
Webアプリを動かすまでのインフラ構築 / infra-build-for-web-app
tomoyk
0
420
コンピュータが大好きな私が大学院進学した理由 / Why I chose graduate school
tomoyk
2
920
この先生きのこるための学び方 / how-to-learn-tech
tomoyk
1
400
佐川急便のフィッシングサイトを調べてみた / Analysis of sagawa fishing site
tomoyk
1
180
既存のWebアプリをセキュアにするためにやったこと / Student-LT-WebSec
tomoyk
0
180
XSSの入力値を調べてみた / searching xss insertion value
tomoyk
3
1.5k
Other Decks in Technology
See All in Technology
三菱電機・ソニーグループ共同の「Agile Japan企業内サテライト」_2025
sony
0
130
Access-what? why and how, A11Y for All - Nordic.js 2025
gdomiciano
1
120
大規模サーバーレスAPIの堅牢性・信頼性設計 〜AWSのベストプラクティスから始まる現実的制約との向き合い方〜
maimyyym
6
3.8k
E2Eテスト設計_自動化のリアル___Playwrightでの実践とMCPの試み__AIによるテスト観点作成_.pdf
findy_eventslides
1
570
ガバメントクラウドの概要と自治体事例(名古屋市)
techniczna
2
210
防災デジタル分野での官民共創の取り組み (2)DIT/CCとD-CERTについて
ditccsugii
0
120
Simplifying Cloud Native app testing across environments with Dapr and Microcks
salaboy
0
120
空間を設計する力を考える / 20251004 Naoki Takahashi
shift_evolve
PRO
4
450
AIツールでどこまでデザインを忠実に実装できるのか
oikon48
6
3.1k
業務効率化をさらに加速させる、ノーコードツールとStep Functionsのハイブリッド化
smt7174
2
110
SwiftUIのGeometryReaderとScrollViewを基礎から応用まで学び直す:設計と活用事例
fumiyasac0921
0
150
いまさら聞けない ABテスト入門
skmr2348
1
230
Featured
See All Featured
Raft: Consensus for Rubyists
vanstee
139
7.1k
Dealing with People You Can't Stand - Big Design 2015
cassininazir
367
27k
The Power of CSS Pseudo Elements
geoffreycrofte
79
6k
Writing Fast Ruby
sferik
629
62k
GraphQLとの向き合い方2022年版
quramy
49
14k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
900
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
14k
A designer walks into a library…
pauljervisheath
209
24k
The Success of Rails: Ensuring Growth for the Next 100 Years
eileencodes
46
7.7k
The Cost Of JavaScript in 2023
addyosmani
53
9k
What's in a price? How to price your products and services
michaelherold
246
12k
Stop Working from a Prison Cell
hatefulcrawdad
271
21k
Transcript
A 856 10132/ -
b W • i o • ek n • •
7 7 • / O 7 C JB • • C JB CPTO n • 4( 2 ) 02 14 •
• K O / • 2 • 2 • 2
!
• • 12 • : • • 12 • •
12 /
#
P P •, LN M RH / • D RH
/ •, LN M I /
http://example.com/abc/d.html https://yahoo.co.jp/index.html
http://example.com:80/abc/d.html ! !
http https ftp (javascript) www.yahoo.co.jp twitter.com abema.tv www.tama-st-h.local 80 443 3000 65535 index.html 123/hello.jpg ~ts13120/a.jpg a/b/c/d.mp3
http://example.com:80/abc/d.html https://yahoo.co.jp:443/def/g.html
• : L 8 : • • 00/ / .
• 00/ / .
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01
Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html lang="ja"> <head> <meta http-equiv="content-type" content="text/html; charset=utf-8"> <meta http-equiv="content-style-type" content="text/css"> <meta http-equiv="content-script-type" content="text/javascript"> <meta name="description" content=" & <B5@1,8 .B/2?A9>B4 4<B7=B@2?6;A0$#&1B:4 +$!& +()% * -A3A+"' "> …
• L H • H <!doctype html> <html> <head> <title></title>
</head> <body> <h1>! !</h1> <p> </p> </body> </html>
32 [Bit] 1 • 1 6 2 • 3 50
.
1 • • 2 .0
9 S 6 P 6I8 N 4 13
.21 9 4 13 .21 D 5 4 13 .21 4 13 .21 . 4 13 .21
http://example.com:80/abc/d.html http://123.45.67.89:80/abc/d.html
• ( ) : .
•
$ whois yahoo.co.jp
• . - -
• 7/ / 67 2 10 3 9 :
TJS ) ( -.
• •
$ whois -h whois.jprs.jp MM14876JP
• cl • 33 • 33 • (
I a • b • P IW 4) . 0 P 8 • WP P P IW e h
#
• W • • / •
D ( T D D S S ( S N
( S ) ) ) ) D
C /
/ A
) ( LAN LAN
/4 13 . 13 03 : 6
Ethernet IP TCP HTTP HTTP
HTTP ) ( ( ) HTTP
HTTP Crystal Project - Everaldo Coelho https://www.iconfinder.com/iconsets/crystalproject
100 Information 100 Continue 200 Success 200 OK 202
Accepted 300 Redirect 301 Moved Permanently 302 Found 307 Temporary Redirect 400 Client Error 401 Unauthorized 403 Forbidden 404 Not Found 500 Server Error 500 Internal Server Error 503 Service Unavailable 504 Gateway Timeout HTTP/1.1 200 OK
• L M 1 • H • D • T
() T S ) ( ) )
• W ? • 2
a / . W e W / 3 3
3 3 3 2 . 21F P e T d a H :
• 4- / . / /- B • B .
0
• G . - . . T 52 • E
G 52 E
T • O - . - - • P3 6
S 3 P3
• 7 .. - 7 4 • G P 4
G N 7
TAP