Dumb question about backing up to "Off-Site" Copy

In case I ever want to consider using some type of online backup service, I need some very basic information.

 

I see all these articles and TOP TEN etc. about remote backup services and I have no idea about the mechanics of "connecting" to their servers, to wit:

 

o Do they make you use their program to connect to their servers?

o Is it as simple as using Ghost 15 and then making the destination an FTP address?

o Or does a mysterious ghost sneak into your home in the middle of the night, hook up everything and hopefully not kill everyone in the house?

o Or does your backup data supernaturally just get there?

 

Just wondering in Oceanside, CA

 

Thanks,

Nathaniel