互联网到底是如何来工作的？

1. HTTP
Tony Deng
https://tonydeng.github.io
https://twitter.com/wolfdeng
https://facebook.com/wolf.deng

3. URL

5. DNS
DNS

6. DNS Server
DNS Port 53
DNS Server 172.20.10.1
taobao.com
110.75.115.70
140.205.220.96

9. DNS

13. DNS nslookup host

14. HTTP

19. HTTP status
codes

20. 200 OK
201 Created
206 Partial Content
2xx
URI Location
GET FlashGet
HTTP

21. 301 Moved Permanently
302 Found
304 Not Modified
3xx
URI
URI
GET

22. 400 Bad Request
404 Not Found
403 Forbidden
405 Method Not Allowed
401 Unauthorized
451 Unavailable For Legal Reasons
4xx
WWW-Authenticate
401
Allow
IETF

23. HTTP Headers

24. HTTP Headers HTTP

27. HTTP Request
“Request Line” HTTP
Headers
“method” . GET, POST HEAD.
“path” .
“Name Value”
“protocol” “HTTP” , 1.1.
“Request-Line”

29. Response HTTP Headers
“Status Line” HTTP Headers Headers

30. Content-Disposition
Content-Disposition: attachment; filename="download.zip"

31. Content-Length
Response Header
Content-Length
Response Header
Content-Length

33. http://igoro.com/archive/what-really-happens-when-you-navigate-to-a-url
https://zh.wikipedia.org/wiki/HTTP
https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
https://en.wikipedia.org/wiki/List_of_HTTP_status_codes
https://en.wikipedia.org/wiki/Domain_Name_System

34. Q & A