# Arbitrum

## Definition

Arbitrum is an Ethereum Layer 2 ecosystem whose Arbitrum One network uses optimistic-rollup technology to execute transactions with lower costs than Ethereum mainnet in many conditions.

## What it means in practice

Arbitrum One has its own network state, balances, fees and bridge paths even though it settles to Ethereum.

## How this concept appears in Terenval Wallet

Arbitrum One is one of the built-in real networks supported by Terenval Wallet.

**Important:** An Arbitrum address may look like an Ethereum address, but assets remain on the selected network until moved through an appropriate bridge or transfer route.

**[Install Terenval Wallet](https://wallet.terenval.com/?lang=en)**

## Related terms

- [Optimistic rollup](https://wallet.terenval.com/glossary/optimistic-rollup/)
- [Rollup](https://wallet.terenval.com/glossary/rollup/)
- [Blockchain bridge](https://wallet.terenval.com/glossary/bridge/)
- [Ethereum](https://wallet.terenval.com/glossary/ethereum/)
- [ETH](https://wallet.terenval.com/glossary/eth/)
- [Network fee](https://wallet.terenval.com/glossary/network-fee/)

## Related Terenval Answers

- [Ethereum Layer 2 Networks and Gas Fees](https://wallet.terenval.com/answers/ethereum-layer-2-networks-and-gas-fees/)
- [Can One Crypto Wallet Manage Multiple Blockchains?](https://wallet.terenval.com/answers/can-one-crypto-wallet-manage-multiple-blockchains/)
- [How Does a Multi-Chain Crypto Wallet Keep Networks Separate?](https://wallet.terenval.com/answers/how-multi-chain-wallets-keep-networks-separate/)

## Sources

- https://ethereum.org/en/layer-2/
- https://wallet.terenval.com/info/supported-networks/

Official page: https://wallet.terenval.com/glossary/arbitrum/