Frequently Asked Questions
A Layer 2 blockchain is built on top of a Layer 1 network, like Ethereum, to handle transactions off-chain. It reduces congestion on the main chain, which leads to faster processing and significantly lower gas fees—helping applications scale without compromising security.
Examples of Layer 2 solutions include Arbitrum, Optimism, zkSync, Starknet, Loopring, and Polygon zkEVM. These platforms improve transaction speed and cost-efficiency for applications that interact with Ethereum.
Rollups batch many transactions off-chain and submit them to the main chain in a single bundle. Optimistic Rollups assume transactions are valid until challenged, while ZK-Rollups use cryptographic proofs to verify them instantly.
Layer 2 networks inherit security from the main Layer 1 blockchain, while sidechains operate with their own consensus mechanisms. Layer 2 is typically more secure, whereas sidechains offer flexibility for custom rules.
Yes, dApps can run primarily on Layer 2 to achieve faster performance and lower fees. Many DeFi apps, NFT platforms, and blockchain games are already live on Layer 2 networks for these reasons.
