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科普帖
L1和L2，市场冷淡学知识。
L1就是大家最熟悉的数据层、网络层、共识层，大家之前接触到绝大部分公链都是源于L1，包括BTC、ETH、SOL等等
L2是应用层，目前主要针对以太坊的扩容，以太坊太堵太慢，大家就把执行层放在L2上，再把执行的结果压缩，返回到L1上，这样能直接提升L1的性能。