domain is a web address..
you can buy the web domain( meaning the website name eg.
www.singapore.com) but then u need some webspace to be host to the
domain so that people can download stuffs using the
domain(address).
when u ping a domain, it usually pings to the server where email,
php, space or anything there.
if u change the hosting provider, the Ip will change given the same
domain
