---
name: Layer 2s
description: "Ethereum L2 landscape — Arbitrum, Optimism, Base, zkSync, Unichain, Celo. How they work, how to deploy, how to bridge, and which to use when. Includes 2025–2026 updates like Celo migration and Polygon zkEVM shutdown."
metadata:
  homepage: https://ethskills.com
  install: external
---

# Layer 2s

Provided by EthSkills. Installs outside this repo — see `catalog.json` `install.command`.