The ground floor. This is where the internet, hardware, and connections exist that allow layer 1s like Bitcoin to run smoothly. Layer 0s are allowing several things to happen:

Blockchain layers (L0, L1, L2, L3) in a Diagram 
My dyslexia made me make this.
 The entire stack 
 Layer by layer 
 L0 
The ground floor. This is where the internet, hardware, and connections exist that allow layer 1s like Bitcoin to run smoothly. Layer 0s are allowing several things to happen:

Generic educational post: Blockchain layers (L0, L1, L2, L3) in a Diagram

Related news