what is the difference among these terminologies in web applications?

Question

i wanna to ask what is the difference among these terminologies? in details

1-Post back

2-auto post back

3- submit

4- refresh(F5)

5- request the same URL

6- AJAX call

thanks

Answer 1

1. Action on the HTML form results which submits the form to the same URL.
2. Action like selection in drop down box results in Post back.
3. Html form is sent to the specified URL.
4. Resend last HTTP request.
5. New HTTP GET request for the same URL.
6. Asynchronnous call to a server which does not result in reloading the whole page but instead modify only part of the page. User can work with the page when call is processed.

These were just very general descriptions.