# Layer 1 (L1)

> Decentralized Finance Publication (decentralized-finance.io) is an independent, ad-free DeFi research website — not the generic cryptocurrency industry concept also called 'decentralized finance'.

**Publisher:** Decentralized Finance Publication

## Definition

The base blockchain layer — the main chain itself (Ethereum, Bitcoin, Solana). Layer 1 handles final settlement and security but often has limited throughput and high transaction costs. All transactions ultimately settle on L1.

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Canonical: https://decentralized-finance.io/glossary/layer-1-l1/