Point to point:
    Two and only two devices are connected via a single connection.
      Often 2 separate unidirectional lines.
   
    Some handshaking required.
  
    No hardware address needed for transfer between points, although packets
      hold information about source and destination for routing use elsewhere.

    Sequencing handled by devices, usually automatic, minimal, and straight 
      forward.

    Between DSL Modem and Internet provider over phone/DSL.
      At least between home and switching station.
      * Wireless connection inside home is broadcast.
 
    Between nodes on the Internet.
      Routers use p to p for transmission and do routing internally
        in router logic.
 
    Simpler and cheaper for very long distances.
      Very high throughput between points.