How many layers are there in blockchain?

In the decentralized ecosystem, a Layer-1 network refers to a blockchain, while a Layer-2 protocol is a third-party integration that can be used in conjunction with a Layer-1 blockchain . Bitcoin, Litecoin, and Ethereum, for example, are Layer-1 blockchains.

Six layers of blockchain technology.

The Layer 0 blockchain lays the road for layer 1 blockchains . It gives the underlying infrastructure to create chains and also it allows cross-chain interoperability which means the chains created on top of layer 0 can communicate with each other.