Nodes, L1/L2, Rollups

L2 Rollups: Optimistic vs ZK, Data Availability Intermediate Infrastructure • ~11 min read • Updated: 08/08/2025 Ethereum’s base layer (L1) optimizes for security and decentralization, not raw throughput. Rollups scale Ethereum by executing transactions off-chain (or off-L1) and then posting compact proofs and data back to L1. The result: much higher TPS with L1-grade security […]