Blockchain industry | What is a Layer 2 network?
A Layer 2 network is a scaling network built on top of the Ethereum mainnet. Transactions are executed on Layer 2, and the results are then written back to the mainnet.
Layer 2 security mainly relies on the Ethereum mainnet: data and proofs are both posted to the mainnet. This is one important difference between Layer 2 networks and sidechains.
$ARB is the governance token of the Layer 2 network Arbitrum.
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