In the previous section, I briefly described the origin and development of the blockchain
In this section, we mainly understand the current types of blockchains.
First, let's look at the answers to the questions in the previous section
Which of the following statements about blockchain is true
- A: Ethereum is an open source blockchain platform that supports smart contracts
- B: Bitcoin is an encrypted digital currency
- C:CryptoKitty is a game that uses blockchain technology
- D: We can develop blockchain applications based on Ethereum
Answer: A, B, C, D (the question itself is not difficult, it is mainly the integration of some knowledge)
Start this section now
Blockchain Classification
There are three types of blockchain
1: Public chain: {nature: free to join and withdraw (Bitcoin, Ethereum, etc.)}
(1): The public chain can be called the public blockchain, often referred to as the public chain, which means that everyone can read and send information (or transactions) and the information (or transactions) can be effectively confirmed, and can also participate in One of the "bookkeeping" blockchains. Case: Bitcoin, Ethereum
(2): Everyone can read and send information (or transactions), and the information (or transactions) can be effectively confirmed, and can also participate in "bookkeeping". For example the Bitcoin network. The figure below shows the distribution of Bitcoin's current global distribution of more than 10,000 nodes.
2: Private chain: {nature: private institution single-center network()}
(1): Also known as proprietary chain. It is a non-public chain, and normally, you cannot join (become a node) without authorization. Moreover, the write permissions in the private chain are strictly controlled, and the read permissions can be selectively opened to the outside world according to needs.
3: Consortium chain: {nature: join and exit by authorization (Hyperledger, R3)}
(1): Refers to the blockchain jointly managed by multiple institutions, each organization or institution manages one or more nodes, and its data only allows different institutions in the system to read, write and send. Case: R3, HyperLedgerFabric
(2) The alliance chain is like a club. For example, the "Forfaiting Trading Platform (BCFT)" jointly built by China Everbright Bank and Bank of China, China CITIC Bank, Minsheng Bank, and Ping An Bank based on blockchain technology is also a consortium chain. The so-called forfaiting trading platform is simply understood as bills and Its derivatives trading platform.
After learning the content of this section, let's do a topic to consolidate it!
What are the three categories of blockchain systems?
- A: Alliance Chain
- B: public chain
- C: data link
- D: private chain