Layer 2 definition
Definición
Secondary framework built on top of main blockchain
L2s like Polygon process 65k TPS vs. Ethereums 15; zk-rollups enhance privacy and scalability for mass adoption. L2 Comparison (2025): Network | TVL | TPS | Avg Fee. Arbitrum | $15B | 4,000 | $0.10. Optimism | $8B | 2,000 | $0.15. Base | $6B | 3,000 | $0.08. zkSync | $4B | 10,000 | $0.05.
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