Are there any detailed 2D Multi-player Tutorials available (Turn base or live action)

Hi, I just started learning development in Unity and have ran through a couple tutorials but none of them went over Networking regarding 2D (Completed my first sidescroller game btw!).

Anyways, I was looking for info to develop a turn base 2D game, something like a chess game at first? What keywords should I be googling to find my sources to help me accomplish this?

Is the networking libraries usage basically the same for Unity3d? (Never did 3d before)
For turn base games, you access a database like mssql to do CRUD operations when you want to make changes to the gameObjects right?

Thanks!

Networking stays the same for 2D.