Câu hỏi phỏng vấn Blockchain
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What's the difference between distributed has...

Câu trả lời

Distributed Hashtable (DHT) technology and the Bitcoin blockchain are both forms of distributed networks, but they serve fundamentally different purposes and operate based on different principles.

Distributed Hashtable Technology

DHT is a decentralized data storage system that uses a key-value store distributed across multiple nodes in a network. Each node in a DHT is responsible for storing a portion of the data based on a deterministic algorithm, which helps in efficiently locating the data within the network. The keys are distributed among the nodes, and a routing algorithm is used to perform requests, which typically allows data to be found in $$O(\log(N))$$ jumps. This makes DHTs highly scalable and efficient in terms of lookup time and storage footprint[1][6].

Bitcoin Blockchain

The Bitcoin blockchain, on the other hand, is a distributed ledger technology specifically designed to be tamper-proof. It records all transactions across a network in a way that is immutable, meaning once data is entered, it cannot be altered. This is achieved through a consensus mechanism known as proof of work, where network nodes must agree on the validity of transactions. Each node in the Bitcoin network stores a copy of the entire ledger, making it highly secure but less scalable compared to DHTs. The blockchain's primary purpose is to ensure the integrity and verifiability of the data it contains, which is crucial for financial transactions and other applications where trust is paramount[1][2][3].

Key Differences

  1. Purpose and Use Case:
    • DHT: Primarily used for efficient data retrieval in distributed networks. It is suitable for applications where data is voluminous and frequently accessed but does not necessarily require the highest level of security against tampering[1][6].
    • Blockchain: Used for maintaining a secure and unalterable record of transactions. It is ideal for applications where integrity and transparency are critical, such as in financial transactions or any scenario where trust needs ...
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