websites urls without file extension?

Question

When I look at Amazon.com and I see their URL for pages, it does not have .htm, .html or .php at the end of the URL.

It is lik

Answer 1

For websites that use Apache, they are probably using mod_rewrite that enables them to rewrite URLS (and make them more user and SEO friendly)

You can read more here http://httpd.apache.org/docs/2.0/mod/mod_rewrite.html and here http://www.sitepoint.com/article/apache-mod_rewrite-examples/

EDIT: There are rewriting modules for IIS as well.