Domain Name and Web Hosting

[admin]

Hi all,
I am a Persian and newbie here, and have some questions,
however may you already have discussed them
but if some one can answer me here, would be greatful,

Yahoo register domain names for only 1.99$ which seems cheap,
but I also decide to register a web hosting, which may its not yahoo
for example godaddy, ixhotsting, dot5...

then how the domain name and web hoster could be related?
I know less about web site systems,

I mean can I register the domain name in yahoo and use it in other web hosting sites,
off course I don't want pay additional costs

please guide me