Arbitrum is a Layer 2 scaling solution designed to make the Ethereum network faster and cheaper to use. It operates as an independent blockchain that settles transactions on Ethereum, aiming to preserve its security while dramatically improving throughput.
The system uses a technology called Optimistic Rollups. It bundles many transactions together off-chain and posts a compact summary to Ethereum. This process significantly reduces the data load, allowing for lower fees and higher transaction speeds than using Ethereum directly.
Most people buy Arbitrum on a major exchange. Binance has the lowest fees and the widest selection — here's the quick version:
It is a Layer 2 network that runs alongside Ethereum. It processes transactions independently but relies on Ethereum's mainnet for ultimate security and settlement.
Security is inherited from Ethereum. Fraud proofs ensure that any invalid transaction submitted to Ethereum can be challenged and corrected by network validators.
Costs are lower because individual transactions are bundled together off-chain. This reduces the amount of data that needs to be processed and stored on the expensive Ethereum mainnet.