Choosing a Layer 2
Trade-offs.
No One-Size-Fits-All L2
There are many Layer 2s, each with different trade-offs. Choosing one means weighing security, cost, speed, and ecosystem.
This lesson gives you a framework to compare them sensibly.
Security Model
The first question is security. Rollups inherit L1 security; sidechains and validiums do not fully.
- ZK rollup: strongest, validity proofs
- Optimistic rollup: strong, fraud proofs
- Sidechain: own validators, weaker
All lessons in this course
- Why Layer 2
- Rollups
- Bridging Assets
- Choosing a Layer 2