The battle for Ethereum expansion: the future of speed and security

Optimistic Rollup and ZK Rollup are key solutions for Ethereum Layer 2 scaling, and they have their own advantages and disadvantages in terms of security, scalability and cost. Optimistic Rollup assumes transactions are valid, enabling faster finality and lower fees, but requires a challenge period of up to several days. ZK Rollup uses cryptographic proofs to achieve near-instant finality and enhanced privacy, but has higher computational costs. Optimistic Rollup is suitable for high-throughput applications like DEX, while ZK Rollup is better at privacy-focused use cases. Both are evolving, adopting hybrid models to meet the various needs in decentralized infrastructure.