Glossary
Layer 2 Meaning: What Does Layer 2 Mean in Crypto?
Definition
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.