Types of Blockchain Networks Flashcards
7 cards from real Blockchain Technology practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Types of Blockchain Networks flashcards as text
Which blockchain network type is most vulnerable to a 51% attack?
Answer: Small public proof-of-work blockchain with low hash rate
Small public PoW blockchains with low hash rates are most vulnerable because an attacker can more easily acquire majority hash power.
A company wants blockchain data to be auditable by regulators but invisible to competitors. Which approach best achieves this?
Answer: Hybrid blockchain with selective disclosure
Hybrid blockchains allow selective disclosure, enabling regulatory auditors to access data while keeping it private from competitors.
What is the key difference between Proof of Work used on a public blockchain and Proof of Authority used on a private blockchain?
Answer: PoA relies on trusted validators while PoW relies on computational competition
PoA uses pre-approved trusted validators making it efficient for private networks, while PoW uses energy-intensive competition open to anyone.
Dragonchain is an example of which blockchain architecture type?
Answer: Hybrid blockchain combining public and private elements
Dragonchain uses a hybrid model where business logic runs privately while cryptographic proofs are anchored to public blockchains.
Which characteristic makes consortium blockchains particularly attractive for trade finance applications?
Answer: They enable multiple competing banks to share a trusted ledger without a central intermediary
Consortium blockchains let competing financial institutions collaborate on a shared ledger while sharing governance and eliminating single-point intermediaries.
What does 'immutability' mean differently in public vs. private blockchains?
Answer: Public chain immutability is enforced by decentralized consensus; private chain immutability depends on the controlling organization
On public blockchains, no single entity can alter records; on private blockchains, the controlling organization could theoretically modify the ledger.
Which blockchain type is LEAST suitable for a decentralized finance (DeFi) application requiring open, permissionless access?
Answer: Hyperledger Fabric
Hyperledger Fabric is a permissioned blockchain that requires identity and access approval, making it incompatible with open DeFi applications.