Difference between a Postback and a Callback

Question

I keep on hearing this words \'callback\' and \'postback\' tossed around.
What is the difference between two ?

Is postback ver

Answer 1

A postback is also a round trip basically when a postback is executed at that time it calls the special method which is known as round trip..Postback is on the server side where as round trip is on the client sid.