| Layer 2 Rollups | Layer 2 refers to blockchain scaling solutions that handle transactions off Ethereum layer 1, with settlement and data availability on L1. |
| ZK-Rollups | Layer-2 smart contracts that verify transactions using cryptographic proofs that are computed off-chain and verified on Layer-1, enabling very low transaction fees and high scalability. Note that although StarkEx and StarkNet are generally referred to as ZK-Rollups, they are not actually zero knowledge. The correct term is Validity-Rollup. |
| Validity Proofs | Verifiable cryptographic validity proofs that attest to the validity of off-chain transactions. |
| STARKs | STARK stands for Scalable... |
