Layer 2 coins

Layer 2 scaling solutions must inherit the underlying security of the main chain. Whereas sidechains may use other networks or validators to secure the chain, layer 2 differentiates itself by inheriting its security directly from the main chain .

Layer 2 protocols or network L2 protocols are a list of communication protocols used by Layer 2 devices (such as network interface cards (NIC), switches, multiport bridges, etc.) to transfer data in a wide area network, or between one node to another in a local area network.

The Lightning Network (LN) is a “layer 2” payment protocol layered on top of a blockchain-based cryptocurrency such as bitcoin or litecoin . It is intended to enable fast transactions among participating nodes and has been proposed as a solution to the bitcoin scalability problem.