automo

(Unicast, broadcast and multicast)[http://www.erg.abdn.ac.uk/users/gorry/course/intro-pages/uni-b-mcast.html]

• Unicast:
  • A piece of information is sent from one point to another point, just one sender and one receiver.
• Broadcast
  • A piece of information is sent from one point to all other points. Just one sender, multiple receivers.
• Multicast:
  • A piece of information is sent from one or more points to a set of other points. May be one or more senders and may be no receivers or any number of receivers.