On Friday, September 18, 2015 at 7:47:58 AM UTC+5:30, Barry Margolin wrote:   
   > In article ,   
   >  b@hotmail.com wrote:   
   >   
   > > Hi,   
   > > If a new ISP starts up,it has to be allocated IP addresses, right? What   
   does   
   > > this mean? What exactly is this step of "allocating", and who does it?   
   >   
   > They contact a Regional Internet Registry and purchase an IP block. For   
   > instance, in North America they get it from ARIN, American Registry for   
   > Internet Numbers.   
   >   
      
   But I thought nobody was in charge of the internet....? If ARIN dislikes   
   someone, and refuses to give them any IPs, then what happens....?   
      
   > > How and when does that address become routable to? I'm no expert on   
   internet   
   > > routing, but it's based on graph theory, right?   
   >   
   > They establish connections to other ISPs, and advertise their address   
   > blocks using BGP, the Border Gateway Protocol.   
   >   
      
   What does this do? Could you just give me a short overview....? I'd prefer   
   that to Wikipedia or whatever... :)   
      
      
   > --   
   > Barry Margolin   
   > Arlington, MA   
      
      
   Thanks for your help.   
      
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