compare · Layer 1 vs Layer 2
Layer 1 vs Layer 2: Blockchain Scaling Explained
A
Layer 1
The base blockchain network responsible for consensus and security (e.g., Bitcoin, Ethereum).
Advantages
- +Maximum security and decentralization
- +Self-sufficient
- +Battle-tested
Disadvantages
- −Limited throughput (Bitcoin ~7 TPS)
- −Higher fees during congestion
- −Hard to upgrade consensus
Use Cases
Store of valueSettlement layerSmart contract platforms
B
Layer 2
A secondary network built on top of Layer 1 to scale transactions (e.g., Lightning Network, Polygon).
Advantages
- +Faster transactions
- +Lower fees
- +Inherits Layer 1 security
- +Scalable
Disadvantages
- −Added complexity
- −Liquidity fragmentation
- −Smart contract risk
- −Withdrawal delays
Use Cases
MicropaymentsGamingHigh-frequency tradingdApps
Key Differences
▸ Position: Layer 1 is the base; Layer 2 sits on top.
▸ Security: Layer 1 provides consensus; Layer 2 inherits it.
▸ Speed: Layer 1 is slow; Layer 2 is fast.
▸ Fees: Layer 1 fees are high; Layer 2 fees are low.
▸ Examples: Layer 1 = Ethereum; Layer 2 = Arbitrum, Optimism, Polygon.
Frequently Asked Questions
Is Layer 2 as secure as Layer 1?
Layer 2 inherits Layer 1 security for final settlement, but has its own smart contract risk. Funds are ultimately secured by Layer 1.
What are popular Layer 2 networks?
For Ethereum: Arbitrum, Optimism, Polygon, Base. For Bitcoin: Lightning Network, Liquid.