What is the difference between Optimistic and ZK Rollups?

Optimistic Rollups assume transactions are valid by default and use a dispute window with fraud proofs. ZK-Rollups use cryptographic validity proofs (zero-knowledge proofs) to instantly verify transactions mathematically on Layer 1.

Do Layer 2 networks compromise security?

Stage 2 Rollups inherit the underlying security and censorship resistance of Ethereum Layer 1 because transaction data or state commitments are posted directly to Ethereum mainnet.

Why are L2 gas fees so much cheaper than Ethereum mainnet?

L2s bundle hundreds of transactions into a single compressed batch before submitting to Layer 1, splitting the base layer gas cost among all users in the batch.

Ethereum

Ethereum Layer 2 Scaling & Rollups Explained

By Ashir KhanAugust 15, 20261 min read

Ashir Khan writes about cryptocurrency security, self-custody, macro market analysis, and regulatory policy at CryptoBeacon.

Multi-layered geometric representation of Ethereum Layer 2 rollup scaling