title: How does domain registration work?
body: <p>I searched on Google and Wikipedia a lot, but I could't find answers for these questions.</p>
  
  <p>1) What exactly registrar company do? They update an root DNS and set there IP of my DNS?</p>
  
  <p>2) How come the registrar can update records in the root DNS? How did they get this privilege? How could I get this privilege too?</p>
  
  <p>3) What exactly do we pay the registrar for? Just for sending one request to the root DNS?</p>
  
  <p>4) When I register a domain, am I the real (in the eye of the law) owner of the domain? How do companies (e.g. Google) protect their domain? Couldn't their registrar just say: <em>"sorry we sold the domain to someone else"</em>?</p>
  
  <p>I hope it's not kind of an offtopic question.</p>
  
  <p>Thanks in advance</p>