Help with connecting computers

Ok. So i have a game(duh) and im using the basic unity “network manager” and the “network manager hud” from in my gameobject by pushing add component and selecting the network manager cause i was told to do so in a class i have. But when i run my game i push the “host server” button on one laptop and then i push the join button on the other laptop BUT FIRST i typed in my other laptops Ip into the little box thingy. But it never connects it just keeps loading. I kno the ip is valid. But it just WONT WORK. Im stuck in my class till i figure dis out. Plz help.

NVM EVERYONE! I FOUND OUT HOW! U HAVE TO PIT PV4 ADRESS I THINK!