What is Layer 1 vs. Layer 2 Blockchain?. Layer 1 is the base chain (e.g., Ethereum mainnet). Layer 2 runs on top to increase capacity and lower costs while inheriting Layer 1 security.
How it works
L2 systems batch many transactions and submit proofs to L1. Users can move funds between layers through bridges with specific trust models.
Why it matters
Layers let applications scale without sacrificing the assurances of a robust base chain.
Common pitfalls
- Assuming all L2s have the same security
- Forgetting withdrawal windows or challenge periods
- Crossing bridges without verifying the official URL
Quick example
You swap tokens on an L2 for low fees, then bridge back to L1 to interact with a specific application.
See also
- Bridge
- On‑Chain vs. Off‑Chain
- EVM
TL;DR: What is Layer 1 vs. Layer 2 Blockchain? defined in plain English with practical next steps.
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