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Blockchain Scalability Trilemma
Understand the fundamental tradeoffs between decentralization, security, and scalability.
5 Questions~3 min2,000 Bits1,000 XP
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Mastery
- 01
The Blockchain Trilemma
The blockchain trilemma, coined by Vitalik Buterin, states that it is extremely difficult for a blockchain to simultaneously achieve all three properties: decentralization, security, and scalability. Most blockchains optimize for two at the expense of the third.
- 02
The Three Properties
- Decentralization: No single entity controls the network. More nodes and wider distribution mean greater decentralization.
- Security: The network is resistant to attacks, manipulation, and double-spending. Typically requires economic incentives and/or computational work.
- Scalability: The ability to handle a large number of transactions per second (TPS) without degradation.
- 03
How Blockchains Make Tradeoffs
- Bitcoin: Prioritizes decentralization and security at the cost of scalability (~7 TPS)
- Solana: Prioritizes scalability and security but requires higher hardware requirements, reducing decentralization
- BNB Chain: Higher TPS with fewer validators - scalability over decentralization
- 04
Attempted Solutions
- Sharding: Splitting the blockchain into parallel shards
- Layer 2: Moving transactions off the main chain
- Modular Blockchains: Separating execution, consensus, data availability, and settlement into specialized layers (e.g., Celestia for DA)
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5 Questions · 2,000 Bits + 1,000 XP
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What will I learn in this crypto quiz?
Each quiz focuses on a specific cryptocurrency topic. Read the lesson first to learn the key concepts, then test your understanding with graded multiple-choice questions.