Adventures
of the
packet
Web Edition
Aaron Kalin
Copyright 1996 TriStar Pictures
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Aaron Kalin
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Aaron Kalin TK-688
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Aaron Kalin TK-688
Martinisoft
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An HTTP Request
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An HTTP Request
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An HTTP Request
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Ý
An HTTP Request
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Ý
An HTTP Request
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DNS Internet
Ý
Server Browser
DNS
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DNS Internet
Ý
Server Browser
Domain Name System
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache Router
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache Router
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
Ɠ
Registrar
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
Ɠ
Registrar
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
Ɠ
Registrar
Nameserver
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
Ɠ
Registrar
Nameserver
dnsimple.com. A IN
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
Ɠ
Registrar
Nameserver
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DNS Internet
Ý
Server Browser
Local Cache ISP
Router
ƃ
Registry
Ɠ
Registrar
Nameserver
dnsimple.com. 3600 IN A 50.31.209.238
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
dnsimple.com. (Query)
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DNS Internet
Ý
Server Browser
dnsimple.com. (Query)
3600 (TTL)
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DNS Internet
Ý
Server Browser
dnsimple.com. (Query)
3600 (TTL)
IN (Class)
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DNS Internet
Ý
Server Browser
dnsimple.com. (Query)
3600 (TTL)
IN (Class)
A (Record)
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DNS Internet
Ý
Server Browser
dnsimple.com. (Query)
3600 (TTL)
IN (Class)
A (Record)
50.31.209.238 (Value)
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
UDP
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DNS Internet
Ý
Server Browser
User Datagram Protocol
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DNS Internet
Ý
Server Browser
User Datagram Protocol
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DNS Internet
Ý
Server Browser
Speed!
User Datagram Protocol
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DNS Internet
Ý
Server Browser
Speed!
No “guarantee” of delivery
User Datagram Protocol
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DNS Internet
Ý
Server Browser
Speed!
No “guarantee” of delivery
Commonly used in video games and
DNS queries
User Datagram Protocol
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DNS Internet
Ý
Server Browser
TCP
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DNS Internet
Ý
Server Browser
Transmission Control Protocol
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DNS Internet
Ý
Server Browser
Transmission Control Protocol
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DNS Internet
Ý
Server Browser
Transmission Control Protocol
Slower than UDP
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DNS Internet
Ý
Server Browser
Transmission Control Protocol
Slower than UDP
“Handshake” overhead
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DNS Internet
Ý
Server Browser
Transmission Control Protocol
Slower than UDP
“Handshake” overhead
Uses “Flow Control” to guarantee delivery
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DNS Internet
Ý
Server Browser
The Internet
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
50.31.209.238
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DNS Internet
Ý
Server Browser
50.31.209.238
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DNS Internet
Ý
Server Browser
50.31.209.238
Open a socket
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DNS Internet
Ý
Server Browser
50.31.209.238
Open a socket
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DNS Internet
Ý
Server Browser
50.31.209.238
Open a socket
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DNS Internet
Ý
Server Browser
50.31.209.238
Computer
Open a socket
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DNS Internet
Ý
Server Browser
50.31.209.238
Computer
Open a socket
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DNS Internet
Ý
Server Browser
50.31.209.238
Computer Router
Open a socket
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DNS Internet
Ý
Server Browser
50.31.209.238
Computer Router
Open a socket
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DNS Internet
Ý
Server Browser
BGP
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DNS Internet
Ý
Server Browser
Border Gateway Protocol
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DNS Internet
Ý
Server Browser
Border Gateway Protocol
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DNS Internet
Ý
Server Browser
Border Gateway Protocol
Lets ISPs share their network routes
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DNS Internet
Ý
Server Browser
Border Gateway Protocol
Lets ISPs share their network routes
Lets the router figure out the next
destination to hand off the packet
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
Router
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DNS Internet
Ý
Server Browser
Router
Router
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DNS Internet
Ý
Server Browser
Router
Router
50.31.209.0/24
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DNS Internet
Ý
Server Browser
Router
Router
50.31.209.0/24
50.31.209.238
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DNS Internet
Ý
Server Browser
Router
Router
Ý
Server
50.31.209.0/24
50.31.209.238
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DNS Internet
Ý
Server Browser
The Server
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DNS Internet
Ý
Server Browser
Ý …
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DNS Internet
Ý
Server Browser
Ý …
80 HTTP
443 HTTPS
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
Computer
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DNS Internet
Ý
Server Browser
Computer
Ý
Server
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DNS Internet
Ý
Server Browser
Computer
Ý
Server
Internet
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DNS Internet
Ý
Server Browser
Computer
Ý
Server
Internet
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DNS Internet
Ý
Server Browser
Computer
Ý
Server
Internet
GET / HTTP/1.1
Accept: text/html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US
Connection: keep-alive
DNT: 1
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DNS Internet
Ý
Server Browser
Request & Request Headers
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DNS Internet
Ý
Server Browser
Request & Request Headers
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DNS Internet
Ý
Server Browser
GET / HTTP/1.1
Request & Request Headers
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DNS Internet
Ý
Server Browser
GET / HTTP/1.1
Accept: text/html
Request & Request Headers
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DNS Internet
Ý
Server Browser
GET / HTTP/1.1
Accept: text/html
Accept-Encoding: gzip,deflate,sdch
Request & Request Headers
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DNS Internet
Ý
Server Browser
GET / HTTP/1.1
Accept: text/html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US
Request & Request Headers
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DNS Internet
Ý
Server Browser
GET / HTTP/1.1
Accept: text/html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US
Connection: keep-alive
Request & Request Headers
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DNS Internet
Ý
Server Browser
GET / HTTP/1.1
Accept: text/html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US
Connection: keep-alive
Host: dnsimple.com
Request & Request Headers
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DNS Internet
Ý
Server Browser
GET / HTTP/1.1
Accept: text/html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US
Connection: keep-alive
Host: dnsimple.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS
X 10_9_4) AppleWebKit/537.36 (KHTML, like
Gecko) Chrome/36.0.1985.125 Safari/537.36
Request & Request Headers
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DNS Internet
Ý
Server Browser
Response & Response Headers
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DNS Internet
Ý
Server Browser
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Server: nginx
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 07 Aug 2014 05:00:03 GMT
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 07 Aug 2014 05:00:03 GMT
Content-Type: text/html; charset=utf-8
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 07 Aug 2014 05:00:03 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 07 Aug 2014 05:00:03 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: close
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 07 Aug 2014 05:00:03 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: close
Status: 200 OK
Response & Response Headers
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DNS Internet
Ý
Server Browser
HTTP/1.1 200 OK
Server: nginx
Date: Thu, 07 Aug 2014 05:00:03 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: close
Status: 200 OK
Strict-Transport-Security: max-age=631138519
Response & Response Headers
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DNS Internet
Ý
Server Browser
The Browser
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DNS Internet
Ý
Server Browser
Rinse & Repeat
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DNS Internet
Ý
Server Browser
Rinse & Repeat
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DNS Internet
Ý
Server Browser
Rinse & Repeat
Download the HTML document and begin
parsing for information
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DNS Internet
Ý
Server Browser
Rinse & Repeat
Download the HTML document and begin
parsing for information
Create new connections (or use existing)
to keep fetching stylesheets, javascript,
images, video, music, etc.
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DNS Internet
Ý
Server Browser
Computer
Ý
Server
Internet
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DNS Internet
Ý
Server Browser
Computer
Ý
Server
Internet
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DNS Internet
Ý
Server Browser
Computer
Ý
Server
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
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DNS Internet
Ý
Server Browser
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Thank you for your time
♥
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Resources & Credits
TCP/IP Illustrated Volume 1
http://amzn.to/X3vOag
Color Palette
http://goo.gl/iOuuP9
Like my driving?
http://bit.do/packet-adventure-rate
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