Academy
advanced · Blockchain
Blockchain Deep Dive: Consensus and Layer 2s
How networks agree on the truth, and how they scale.
Blockchains need every participant to agree on one history.
• Proof of Work: miners spend energy to add blocks (Bitcoin).
• Proof of Stake: validators lock up coins as collateral (Ethereum).
• Layer 2 networks batch many transactions and settle them on the main chain for lower fees.
Understanding these trade-offs helps you judge new projects and their security claims.
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