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

Transcript

1.  
      A 856 10132/ -
2. b W • i o • ek n • • 7 7 • / O 7 C JB • • C JB CPTO n • 4( 2 ) 02 14 •
3. • K O / • 2 • 2 • 2 !
4. • • 12 • : • • 12 • • 12 
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5. #
6. P P •, LN M RH / • D RH / •, LN M I /
7. 
   
8. http://example.com/abc/d.html https://yahoo.co.jp/index.html 
   
9. 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 
   
10. http://example.com:80/abc/d.html https://yahoo.co.jp:443/def/g.html 
    
11. • : L 8 : • • 00/ / . • 00/ / .
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     <!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+"' "> …
14. • L H • H <!doctype html> <html> <head> <title></title> </head> <body> <h1>! !</h1> <p> 
           </p> </body> </html>
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16. 32 [Bit] 1 • 1 6 2 • 3 50 .
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    4 13 .21 D 5  4 13 .21     4 13 .21 . 4 13 .21
20. http://example.com:80/abc/d.html    
       http://123.45.67.89:80/abc/d.html
      
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23.  
    
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     $ whois yahoo.co.jp
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26. • 7/ / 67 2 10 3 9 :   TJS   
     ) ( -.
27. •       •  
      
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     $ whois -h whois.jprs.jp MM14876JP
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     P IW 4) . 0 P 8 • WP   P P IW e h
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31. • W • • / •
32. D ( T D D S S ( S N ( S ) ) ) ) D 
    
33. C    
        / / A
34. ) ( LAN
    LAN
    
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39. /4 13 . 13 03 : 6
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41. Ethernet IP TCP HTTP HTTP
    
    
42. 
      HTTP  ) ( ( ) HTTP    
     HTTP  Crystal Project - Everaldo Coelho https://www.iconfinder.com/iconsets/crystalproject
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     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
44. • L M 1 • H • D • T () T S ) ( ) )
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     3 3 3 3 2 . 21F P e T d a H :
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       TAP