The Role of Taxonomy and Ontology in Semantic Layers - Heather Hedden.pdf
The Internet Is a Series of Tubes
1. The Internet is a Series of Tubes
A Practical Understanding of the Internet
2. Who are you?
John Hobbs
- Developer at What Cheer
- @jmhobbs
- https://github.com/jmhobbs
- http://velvetcache.org/
The Internet is a Series of Tubes
3. This is the Internet
The Internet is a Series of Tubes
4. ?
You What Cheer
The Internet is a Series of Tubes
5. This is Your Computer
72.113.10.126
(sort of)
The Internet is a Series of Tubes
6. ?
You whatcheer.com
(72.113.10.126) (???.???.??.???)
The Internet is a Series of Tubes
7. Connecting Computers
jmhobbs@Cordelia:~$ ping -c 3 192.168.1.2
PING 192.168.1.2 (192.168.1.2) 56(84) bytes of data.
64 bytes from 192.168.1.2: icmp_req=1 ttl=64 time=4.98 ms
64 bytes from 192.168.1.2: icmp_req=2 ttl=64 time=2.58 ms
64 bytes from 192.168.1.2: icmp_req=3 ttl=64 time=2.60 ms
--- 192.168.1.2 ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2002ms
rtt min/avg/max/mdev = 2.584/3.390/4.985/1.128 ms
jmhobbs@Cordelia:~$
192.168.1.4 192.168.1.2
(Me) (Alex)
The Internet is a Series of Tubes
10. Translating Your Desires
DNS
Domain Name System
google.com 74.125.73.106
(Name Server)
The Internet is a Series of Tubes
11. Something Useful?
Some DNS Records Types
A – Map an domain to an IP address
google.com => 74.125.73.105
CNAME – Map a domain to another domain
catz.whatcheer.com => cats.whatcheer.com
MX – Map a domain to it's (inbound) mail servers
10 mail.google.com
TXT – Arbitrary human readable notes
Oh hai.
The Internet is a Series of Tubes
12. Something Useful?
jmhobbs@Cordelia:~$ dig @dns1.stabletransit.com whatcheer.com any
...snip...
;; ANSWER SECTION:
whatcheer.com. 3600 IN SOA dns1.stabletransit.com. ipadmin.stabletransit.com.
1313437917 3600 300 1814400 300
whatcheer.com. 3600 IN MX 10 ASPMX.L.GOOGLE.com.
whatcheer.com. 3600 IN MX 20 ALT1.ASPMX.L.GOOGLE.com.
whatcheer.com. 3600 IN MX 20 ALT2.ASPMX.L.GOOGLE.com.
whatcheer.com. 3600 IN MX 30 ASPMX2.GOOGLEMAIL.com.
whatcheer.com. 3600 IN MX 30 ASPMX3.GOOGLEMAIL.com.
whatcheer.com. 3600 IN MX 30 ASPMX4.GOOGLEMAIL.com.
whatcheer.com. 3600 IN MX 30 ASPMX5.GOOGLEMAIL.com.
whatcheer.com. 3600 IN NS dns1.stabletransit.com.
whatcheer.com. 3600 IN NS dns2.stabletransit.com.
whatcheer.com. 3600 IN A 98.129.229.176
;; ADDITIONAL SECTION:
dns1.stabletransit.com. 300 IN A 69.20.95.4
dns2.stabletransit.com. 300 IN A 65.61.188.4
...snip...
jmhobbs@Cordelia:~$
The Internet is a Series of Tubes
13. DNS Server
?
You whatcheer.com
(72.113.10.126) (???.???.??.???)
The Internet is a Series of Tubes
14. DNS Server
whatcheer.com?
98.129.229.176
?
You whatcheer.com
(72.113.10.126) (???.???.??.???)
The Internet is a Series of Tubes
15. DNS Server
You whatcheer.com
(72.113.10.126) (98.129.229.176)
The Internet is a Series of Tubes
16. Something Useful?
jmhobbs@Cordelia:~$ ping -c 1 whatcheer.com
PING whatcheer.com (98.129.229.176) 56(84) bytes of data.
<snip>
jmhobbs@Cordelia:~$
whatcheer.com 127.0.0.1
jmhobbs@Cordelia:~$ ping -c 1 whatcheer.com
PING whatcheer.com (127.0.0.1) 56(84) bytes of data.
<snip>
jmhobbs@Cordelia:~$
http://detoursapp.com/ - Jerod Santo @sant0sk1
The Internet is a Series of Tubes
17. DNS Server
You whatcheer.com
(72.113.10.126) (98.129.229.176)
The Internet is a Series of Tubes
18. DNS Server
You whatcheer.com
(72.113.10.126) (127.0.0.1)
The Internet is a Series of Tubes
19. DNS Server
You whatcheer.com
(72.113.10.126) (98.129.229.176)
The Internet is a Series of Tubes
20. Sweet HTTP
jmhobbs@Cordelia:~$ telnet whatcheer.com 80
Trying 98.129.229.176...
Connected to whatcheer.com.
Escape character is '^]'.
GET / HTTP/1.1
Host: whatcheer.com
User-Agent: John Hobbs (like Gecko)
HTTP/1.1 200 OK
Server: Apache/2.2
Content-Type: text/html; charset=UTF-8
Date: Fri, 02 Sep 2011 18:53:13 GMT
Transfer-Encoding: chunked
Connection: Keep-Alive
Set-Cookie: X-Mapping-dghlffcp=3CB0F424661D80A0FCF7A43668C564F3; path=/
1ff3
<!DOCTYPE html>
<html lang="en">
...snip...
</html>
0
jmhobbs@Cordelia:~$
The Internet is a Series of Tubes