Request and Response cycle

 Two kind of request.

GET and POST

GET	POST
get data	post data
www.abc.com/?greeting=hello	parameters in the body
has max length	no max length
can be cached or bookmarked	not cached or bookmarked
don't change server state	post, update, delete data

GET request:

1. request/start-line (GET/path to resource/HTTP 1.1)

2. header

3. body

response:

1. status-line (HTTP 1.0 200 OK)

2. header

3. body

some response codes:

1. 2XX - ok

2. 3XX - redirected (eg. 302)

3. 4XX - client errors (eg. 404 URI not found)

4. 5XX - server errors (eg. 505 http version not supported)