How many nodes does Ethereum have

1. Eth is a kind of digital token of Ethereum, which is regarded as "bitcoin version 2.0". It adopts the blockchain technology "Ethereum", which is different from bitcoin. It is an open-source public blockchain platform with intelligent contract results, and a resonance network composed of tens of thousands of computers around the world. Developers need to pay eth to support the application. Like other digital currencies, ether currency can be bought and sold on the trading platform

warm tips: the above explanations are for reference only, without any suggestions. There are risks in entering the market, so investment should be cautious. Before making any investment, you should make sure that you fully understand the nature of the investment and the risks involved in the proct. After a detailed understanding and careful evaluation of the proct, you can judge whether to participate in the transaction
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2. After nearly two years of bear market in the currency circle, the currency price of Ethereum has now dropped to more than 900 yuan, and the current downward trend continues. Short Ethereum is now a better trading strategy. At present, digital currency exchanges that can be short, such as coin an, fire coin, bitnet.

3.

Ethereum is an open source public blockchain platform with smart contract function. It provides decentralized virtual machine (Ethereum virtual machine) to process point-to-point contract through its special cryptocurrency ether (also known as "Ethereum")

The token on the

blockchain is called ether, and the code is eth. It can be traded in many foreign exchange markets of cryptocurrency, and it is also the medium used to pay transaction fees and computing services on Ethereum

the concept of Ethereum was first proposed by vitalik buterin, a programmer, from 2013 to 2014, inspired by bitcoin, with the general meaning of "next generation cryptocurrency and decentralized application platform", and began to develop through ICO crowdfunding in 2014. As of February 2018, Ethernet is the second highest cryptocurrency in market value, second only to bitcoin

extended data:

Ethereum platform has no characteristics and value. Like programming languages, it's up to entrepreneurs and developers to decide what to use. However, it is clear that some application types benefit more from the functions of Ethereum than others. Ethereum is especially suitable for those applications that automatically interact directly between points or promote group coordination activities across networks

for example, coordinate the application of point-to-point market, or the automation of complex financial contracts. Bitcoin enables indivials to exchange money without the help of financial institutions, banks or governments. The impact of Ethereum may be more profound

in theory, any complex financial activities or transactions can be automatically and reliably carried out on Ethereum with coding. In addition to financial applications, any application scenario with high requirements for trust, security and persistence, such as asset registration, voting, management and Internet of things, will be affected by Ethereum platform on a large scale

4. Generally speaking, undefined index is the exact writing problem in the process of writing. Notice generally prompts for errors that are not directly related to the execution of code, but don't forget that notice sometimes returns some rendant error information

5. How many account addresses can an Ethereum node have at most
A: generally, there is only one account address, otherwise there will be an error! Blockchain itself is unique. If there are multiple account addresses on one node, it violates the fundamental principle of blockchain!

6. I plan to start a series to talk about architecture. My previous experience is mainly in the area of Internet architecture. Recently, I am sorting out and analyzing the architecture of bitcoin, Ethereum and EOS, so I am going to write a series of articles to talk about the understanding of Internet architecture and blockchain architecture. It will be divided into four articles: 1. Internet proct architecture, 2. Bitcoin architecture analysis, 3. Ethereum architecture analysis, 4. EOS architecture analysis
there is no central server in Ethereum. Instead, there are many equal nodes connected by P2P protocol, which store all the data in many nodes. When a user initiates a transaction, the transaction will be broadcast out through P2P protocol. The miner node verifies, packages and further broadcasts the transaction to the whole network. After confirmation in the blockchain, the operation is considered to be unchangeable
in the articles on blockchain on the Internet, the two words distributed and decentralized are mentioned, sometimes slightly different, sometimes mixed. The author thinks that if we want to distinguish accurately, the distributed system emphasizes that multiple components work together by sending messages, and the decentralized system emphasizes that there is no central node to control the operation of the whole system. Therefore, we think that Ethereum is both decentralized and distributed, or running a decentralized program on a distributed platform.

7. Life is like a pool of ckweed, green and green, with a little bit of water color. When there is no wind, it is like a piece of cloth on the surface of the pool, without any wrinkles. It is also like a natural bronze mirror floating in the pool. Among them, there are also several branches that go straight across the surface of the pool. The surface of the ckweed is slightly broken, but it can't be completely cut, which shows its vitality. Weeds and Kingfisher also disturb the surface of ckweed from time to time, and the ripples of fish are inevitable, which makes ckweed more crowded and tense. Strong wind, wrinkled is ckweed; It is weeds that bend their heads; It is Kingfisher that has disappeared for a long time. The wrinkle is only for a moment. When the wind is a little small, Ping's face returns to its original state. After that, it was wrinkled and floating. Sometimes there are fish "visits.". Wind is the devil, weeds are bacteria, but they can't destroy it. After the wind, the surface is still intact - except for a few sundries. This reminds me of Wen Tianxiang's poem "life experience is ups and downs, the rain hits Ping". Yes, life is not like ckweed. There are always disturbances in a quiet life; And the wind and waves contain a peaceful life. The twists and turns of life, it is not the wind ckweed survival, ckweed is to take root in the water, and people are to survive in the world. Bumpy, long life, sighing to the sky, sighing the past life; Praise the Yellow River, praise the Yellow River majestic; Weeping at the grass, weeping grass nobody knows; Standing on the high mountain singing, singing the power of the high mountain; If there is only the tranquility of ckweed and no strong wind in life, then life is a cup of fresh water and tasteless; If there is only Xiaohe's selfishness, the world is frozen everywhere; If there is only the arrogance of Dashan, there is no selfless love in the world... Your own life and your own road are under your own feet and controlled by yourself. life! Duckweed!

8. There is no problem at all, but relatively speaking, we must buy some reliable ones, because we must pay attention to them.