What does node mean in virtual currency
core analysis:
1. Transparency, 2. Openness, 3. Information can not be tampered with, 4. Decentralization,
5. Detailed analysis
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system
1. In a narrow sense, blockchain is a kind of chained data structure composed of data blocks connected in sequence according to the time sequence, and it can not be tampered with and forged by cryptography
2. Broadly speaking, blockchain technology uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, and uses cryptography to ensure the security of data transmission and access It is a new distributed infrastructure and computing method to program and operate data by using intelligent contract composed of automated script code.
a node is a network node in the blockchain distributed ledger system. By connecting servers, computers and other devices through the network, different types of blockchains have different ways to become nodes. For example, bitcoin participates in trading and mining, and EOS participates in election campaign to become a node
the following is what is a bitcoin full node
bitcoin full node is the node that downloads and preserves complete blockchain data by loading bitcoin clients (including bitcoin unlimited and bitcoin)
because of the congestion of the blockchain transaction network, the author solves the problem by adjusting the broadcast communication, information encryption and decryption, consensus mechanism and transaction verification mechanism. In the whole bitcoin network, from miners to ordinary users can be regarded as a node in the bitcoin network, but because bitcoin has the characteristics of multi centralization, In the whole network, its important role is "bitcoin all nodes."
bitcoin nodes constitute the bitcoin network and become a member of the network. To be able to trade with other nodes is to verify the transactions on the network (consensus mechanism).
1) wallet. It's used to store your bitcoin balance. In principle, as long as you have the private key of your own bitcoin address, you can use your own bitcoin
2) verify the transaction or payment. After receiving the transaction, the bitcoin node will use certain algorithms to verify the validity of a transaction. If you only change the balance of bitcoin in your computer, others will not recognize it. Similarly, your wallet will not recognize the transaction changed by others
3) mining. Core wallet can start mining function through a command to join the mining army, while SPV wallet usually can't (SPV is just passing by). However, it is not the node type that hinders home computer mining, but the rapid development of professional mining machines. Compared with ordinary computers, the computing power of ordinary computers is very small. Mining by ordinary computers is like digging your own backyard with a hoe, and then expecting to dig out gold
because of the demand of bitcoin users, bitcoin exchange was born. The exchange provides a place for centralized trading. People put money on the exchange, and the exchange will match and trade together, similar to stocks and securities. Therefore, banning exchanges does not mean banning bitcoin. Bitcoin network cannot be banned. Bitcoin is sent to the exchange's wallet, and all you see is a balance given to you by the exchange. In fact, you no longer have your own bitcoin. Bitcoin network is global. Where there is a network, there will be bitcoin. After the exchange closes, bitcoin will not disappear, but will return to where it should be.
bitcoin is a kind of point-to-point e-cash system, more directly, node to node. Each transaction is broadcast by the originator to the nodes around it, and then broadcast to the nodes around it after receiving it, and finally spread to the whole network
every bitcoin wallet is a node, and the node with a complete blockchain ledger is called the whole node. In October 2017, there were about 9300 nodes in the bitcoin network, which were responsible for broadcasting and verifying bitcoin transfer transactions. After the transfer transaction occurs, all nodes broadcast to the whole network. After the mining node verifies that the transaction is correct, it will be recorded in the blockchain ledger. The United States, Germany and France have the largest number of bitcoin nodes, with China accounting for about 5% of the world's total nodes Data source: bitcodes. 21. CO) running bitcoin node does not provide any reward, and it does not need the whole node to transfer bitcoin, so the total number of bitcoin nodes only accounts for a small part of the node number.
I haven't heard of the saying "the sub currency of virtual currency". I don't know if you are talking about the bifurcation of virtual currency. For example, Ethereum and ethereal classics, bitcoin and bitcoin cash, etc. (if you want to know more, you can go to coin easy to have a look), is that what you mean
bifurcation refers to the community's disagreement when the blockchain network is "upgraded", which leads to the blockchain system being divided into two and the emergence of two different blockchains, as shown in the figure below
naturally, a new token appears in the new blockchain, which is what we call bifurcation coin. For example, in July 2017, in order to solve the congestion problem of bitcoin blockchain, several different solutions were proposed, which led to the bitcoin blockchain split in two and formed a new currency BCH (bitcash)
to some extent, BCH is the child of bitcoin, because it was born from the original system of bitcoin
In addition, bifurcations can be divided into "hard bifurcations" and "soft bifurcations", or take bitcoin as an example:1. Hard bifurcations refer to the fact that the old node refuses to accept the blocks created by the new node when the bitcoin code changes. The blocks that do not conform to the original rules will be ignored, and the miners will create new blocks after the blocks they finally verify according to the original rules
2, Soft bifurcation can be compatible both backward and forward
although blockchain forking will not split your currency in two, it may also proce a new currency on the basis of the original, but blockchain forking is not good news most of the time, because it represents great differences in the community
of course, not all blockchains will have forks, and most of the forked currencies appear in digital currencies adopting POW consensus mechanism
bitcoin unlimited version and bitcoin version) and
downloads and preserves complete blockchain data Currency exchange (digital currency trading platform)
In network theory or graph theory, the term node refers to the point where lines intersect or branch in a network topology
in telecommunication network, a node (English: node, Latin: NOS) is a connection point, which means a redistribution point or a communication endpoint (some terminal devices). The definition of a node depends on the network and protocol layers mentioned
a physical network node is an active electronic device connected to the network, which can send, receive or forward information through the communication channel. Therefore, passive distribution points (such as patch panels or patch panels) are not nodes
In data communication, a physical network node can be a data circuit termination equipment (DCE), such as modem, hub, bridge or switch; It can also be a data terminal equipment (DTE), such as a digital mobile phone, printer or host (such as router, workstation or server) In the fixed telephone network, a node may be a public or private telephone exchange, remote hub or computer, which provides some intelligent network services. In cellular communication, switching points and databases, such as base station controller, home location register, gateway GPRS support node (GGSN) and GPRS service support node (SGSN), are examples of nodes. A cellular network base station is not considered a node in this context Network topology refers to the specific arrangement of the members of a network. It can be divided into physical, that is, real, or logical, that is, virtual. If the connection structure of two networks is the same, we say that their network topology is the same, although their internal physical wiring and the distance between nodes may be differentsource: network node