Glossary
Bitcoin Glossary

Layer 2

Also known as: layer 2, l2

Protocols built on top of the Bitcoin base layer (Layer 1) that handle transactions off-chain for speed and low cost, then settle back to the main blockchain. The Lightning Network is the most prominent Layer 2.

Lessons mentioning "Layer 2"

Smart Contracts: Bitcoin vs EthereumAltcoin Categories ExplainedBitcoin Forks Explained: Hard Fork vs Soft ForkScalability and Layer 2DeFi and NFTs on Bitcoin2025 Resilience Factors & Future OutlookOther Layer 2 Solutions