How can I use the new networking system for the benefit of my game?

Hi I have 2 questions:

How can I use the new networking components?

How can I make a game where up to 4 players can locally/globally connect and meet on the same map?

Do you already have a single-player version of your game? Unity has written a checklist in their manual to convert a single player game into a multiplayer game.

Read the tutes mate.