I'm lacking basic knowledge of domain controlled networks, so I'll ask few simple questions.
1) what exactly is a domain ? what are main diffrences between workgroup and a domain
2) what do I gain with a a server that controlles a domain and all computer connect to that domain
do I some how control client computers, if yes in what way
3) do I need to own an internet domain (expample: something.com) to use it locally
Some good howtos or tutorials in this direction would be greatly appriciated.