The layered Layer 0 of the blockchain is the data transmission layer, which refers to the most basic underlying protocol of the blockchain, that is, the communication layer that transmits messages between nodes, and is responsible for basic data transmission and consensus-building efficiency.

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Layer 1 is the underlying blockchain. Bitcoin (BTC), Ethereum (ETH), Coin Security Intelligent Chain (BNB) and Solana all belong to the Layer-1 protocol. Layer 2, also known as offline expansion, refers to improving the transaction processing speed through state channels