Ethereum nodes

1.

ethereum is an implementation of blockchain. In Ethereum network, many nodes are connected with each other to form Ethereum network:

Ethereum node software provides two core functions: data storage and contract code execution

in each Ethereum node, complete blockchain data is stored. Ethereum not only saves the transaction data on the chain, but also saves the compiled contract code on the chain

At the same time, a virtual machine is provided to execute the contract code

Ethereum virtual machine

Ethereum blockchain not only stores data and code, but also contains a virtual machine (EVM) in each node to execute contract code - it sounds like a computer operating system

in fact, this is the core difference between Ethereum and bitcoin: the existence of virtual machine has brought blockchain into the era of 2.0 and made blockchain a friendly platform for application developers for the first time

the above content comes from the introction course of Ethereum DAPP development

2. Yes, but it is better to use overseas servers. In addition, the server configuration should be medium or above.

3. 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

4. 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!

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

6.

Compared with bitcoin's prestige, although the rise of the value of ether currency is more terrible than that at the beginning of the year, its reputation and market scale are still inferior to bitcoin. Peter szilagyi, director of bitcoin development team, brought the data of Ethernet network nodes to Google Earth to tell you clearly how Ethernet will dominate the digital currency world in the future

in the two years since its birth, Ethereum has rapidly occupied the rich countries or regions in the world

if we compare the richer regions in the world, such as Europe and North America, with the poorer regions in Asia and South America, & quot; In an email interview with CNBC, szilagyi wrote: & lt; You will find that the density of active nodes is related to the transportation convenience, instrialization and affluence of the region. In my opinion, this correlation is e to the relatively concentrated resources required for the full operation of Ethereum& rdquo;

7. EOS: Grapefruit can be understood as enterprise operation system, which is a blockchain operating system designed for commercial distributed applications. EOS is http://EOS.IO A new blockchain architecture introced by the software aims to realize the performance expansion of distributed applications. Note that it's not a currency like bitcoin and Ethereum, it's based on http://EOS.IO The token released on top of the software project is called blockchain 3.0.

8. The building owner met the black platform. The water of virtual currency is very deep. In addition to the mainstream bitcoin and Ethereum, many digital coins are virtual coins and air coins, which have no real value
as for the trading platform, the situation you said will not appear on the regular trading platform. It's quite possible to make a mistake in investment. You should be cautious in future investment. You can send private letters to teach you how to identify black platforms and choose formal trading platforms.

9. ethereum node needs to sync,please wait_
translation result:
Ethereum node needs to be synchronized, please wait a moment
please
English [PLI & # 720; z]
us [pliz]

int. please (politeness)
vt; To please or satisfy.
VI; Please hurry up, please hurry up, please play cards