Queries about website domain name URL redirection

[uthra]

Some website has been automatically redirected to that home page while entering the domain name without WWW format.For example if i entering the website name amazon.com means,then it has automatically redirected to www.amazon.com.I want to know about the tricks regarding that URL redirection.

[schwa]

It's something about the cookie or history for web browsers. If there are many visitors who type your domain without http, then the browser may remember that the domain without http actually is the one with http. Sorry if my opinion is wrong and sorry for my poor English.