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hello all, I have some problems about testnets.

what is a testnet?? why Ethereum has  more than one test net??  could anyone give me a clear answer and offer me some resources for more education??

Thank you!

Testnet is a new version of blockchain/technology uses for experiment and test purposes.

Ethereum testnets network are also chain(not mainnet) used to create more testings and different application whereas to try out for bugs and other conflicts that may arises from testing.

Here is a good article explaining everything about testnet including related to ethereum network.

https://blog.logrocket.com/top-4-ethereum-testnets-testing-smart-contracts/

He already made a thread on the acquisition of testnet reward before finding out about testnet itself. Firstly, I don't find the reward of testnet worth the while, because the number of people interested are usually high,so these reward are so insignificantly small. As much as bitcoin talk help on every question on cryptocurrency, the definition on testnet can be search engine can help out too. Don't wait on testnet, this is the best time to purchase those coins and 100x

Test net is a way for the developers to check various things before it will be implemented into the main net, test net act as a way for the developers tried the proposal and what would be the advantage and disadvantage from the proposal that already implemented.
You can learn more here and ethereum itself has been creating an educational page for you https://ethereum.org/en/developers/docs/networks/

Testnet is experimental, you participate in one makes you a tester, and you will make some swap or test run the service to find any bugs and report back to the team or dev, you will be rewarded for doing so, mind you I don't like test net because it's not always straight forward and most of all you won't always get paid.

Projects and coins continually add new functionality to be successful future implementations must not harm the blockchain here testnet  work begins a cryptocurrency testnet is essential for development developers can test on this network without affecting the main network developers programmers and experimenters use them the actions of  the test network have no effect on the main blockchain developers make near identical genesis blocks for blockchain clones this marks the testnet blocks and currency. This divides the two blockchain and inhibits coin transfers this technique prevents testnet coin from being transferred to the mainnet original network this solved the testnet 2 problem and prevented fraud Mining was also resolved current testnets don't raise the cryptocurrency mining difficulty this makes mining bitcoins in a tesnet so easy that it nullifies their value testnet are identical to their original network except for mining and marking genesis blocks if a new implementation works on the testnet it should also operate on the mainnet.

Testnet program are only applicable to new blockchain project that is urging people to test and find bugs over the network that allow users to give feedback to developers what's gonna be to solve and focusing on more development for the technology before releasing their mainnet to the public. Developers also giving rewards to testnet participants if the project is successful.

testnet is a testing process for the new network before it will be fully launched. In my opinion if testnet was relating to the network while any functions are applicable to be tested first before it will be launched by the developers. This is a process for the product to be tested and to make sure if there would be no bug or something like that can hurt the project in the future. we have seen so many projects dead cuased by bug

With the help of the test network, projects check how the developed platform product works. For example swaps, trading orders, staking and more. By joining the testnets, you can understand how the blockchain works and understand what this or that platform offers. There are a lot of them now, but you can earn only in single projects.

I'm sure you ever heard of the word called test right?. I am sure you know what it meant and i am sure you have many questions like this one. Developers create new blockchain network which is to test something new that may be a good disadvantage and also experiments that those developers wanted to do. Of course they wanted to find something that could be useful in the Mainnet. Anyway, it's just how I see with testnet and I could be wrong.

Testnet is a collective network that is designed to test. You can play around with yourself or others, about the underlying system of the network itself. You might also hear there is a thing called regtest, the difference between testnet is regtest is local only. You can only play around by yourself.

Why do Ethereum network has many testnet is because each testing network has a different use case for the things that are being tested. You can see a full information about that here: https://ethereum.stackexchange.com/questions/27048/comparison-of-the-different-testnets

i thing it obvius testnet is from of 2 word "test" and "network" (maybe i'm wrong), so testnet is like tested product before they pubish it, they are runing it to prevent bug, and such error in mainnet.

Before launching into the market and reaching consumers, each product goes through many stages of research and production, in which it is important to prove that the product is safe and of good quality, called testing. Testnet is that you participate in the process of testing and evaluating the quality of a certain blockchain and you are called a tester.

These days, serious and quality projects before the product launch eventually they find users to test their product and they will often have a reward to thank those who have shown interest in the project early stages of their project. Must say these days testnet is becoming more popular than airdorp or bounty and the rewards from testnet are well worth your efforts.

testnet can mean the process of testing a product and confirming if there are no bugs or anything like that, and for cryptocurrency testnets it is very important for development developers to be able to test on this network without affecting the main network developers, and for testnet to be rewarded they will be rewarded for testing work

Testnet is a blockchain network used for testing the performance of blockchains. It is one of the steps that developers of blockchains have to take to test the function of a blockchain network. The test is important so as to avoid the risk of losing real money - as it is carried out without using real crypto assets. Once the testing period is completed, the network will now be launched to mainnet. Tokens/coins used for testnets have no real value, while those used on mainnet have real value. You can learn more on this site: https://blog.logrocket.com/mainnet-vs-testnet-environments-explained/

Testnets can show some kind of working prototype for a blockchain project and be used by developers for testing, and this is the network that is used before launching the project to test all functionality.
or a trial network to check performance and to see how people use it, when a new network is formulated. Then and when it became popular and liked by most people, it became permanent and then, Mainnet.

The definitions of testnet have been explained by everyone above, I see that you guys seem to be very interested in testnet from my recent articles. If you are intending to join the testnet to make money then I can tell you that you are choosing the right path to go rather than anyone trying to participate in an airdrop or bounty campaign. Testnet is gradually gaining popularity but there are not too many participants yet because participating in testnet requires you to work harder and more seriously to receive the rewards. The parts obtained from the testnet are very valuable and worth your effort, wish you all the success with the testnet.

testnet is a test network that can be used to test smart contracts or certain projects, on ethereum have like rinkeby, ropsten and others but why there are so many tesnet because maybe it can be an option for the community to use and test it

I'm just trying to explain a little bit about what you need in my knowledge on this subject.

Testnet, also known as test network, is an experimental network where programmers can test, create, even alter, features and keep track of how the blockchain network is performing. In general, testnets seek to guarantee accurate comparisons, take chances, identify the optimal model, and ensure quicker mainnet builds. To effectively test complex networks at scale, each blockchain network has its own testing methodology, standards, equipment, and certifications.

Since Ethereum is a protocol, this implies that there are numerous separate "networks" that adhere to it but do not communicate with one another. You can use the network for use cases involving development, testing, or production. It is a unique Ethereum environment. Despite the fact that your Ethereum account will function across several networks, your account balance and transaction history.

Testnet is a trial. If you see testnet, then you are in test mode. This illustrates the mainnet mode will also work according to the ongoing testnet mode. This is not much different from the beta.
If you create an app, before officially launching it to the public, then you must launch the beta version of the app as a feasibility test.
Likewise on the Ethereum blockchain. Before the official version of the token is released to the public, a testnet version will be developed as a trial.

Exactly, every app released testnet version for blockchain network testing and even project team will reward anyone who use testnet feature will be given token/coin reward, some testnet even worth more than $100+ for each user and but we have to make sure to join the program testnet of popular projects.

Based on I know several time joining with testnet seems pre launching some project before they have launch with mainnet project, usually last several year have pre ICO or pre IEO sale before coin listing on market, but now days change way by launching testnet early before some coins project launching and listing on the market. Close to say testnet is the way how advertising some coins project to the public and become way for some people want to get coin free by doing task on testnet project. Some coins I know with testnet before launching become mainnet like Biconomy, I joined with this testnet project and have bigger reward distribution.

I think the one you are talking above are called testnet airdrops. I have tried participating on some of them in the past and usually those who conduct it are newly released projects and since it's an airdrop, obviously they will gave away some of their tokens.

If you are lucky that you join a good project then it's possible to get 100 dollars or more on them but if not then you can also get zero which happens to me a lot of times. Older projects like ethereum do rarely have an airdrops like this because I think they are already stable and rarely make any changes. They do also have the funds to hire the best developers to test their networks.

From the name Testnet you can find it very clear that testnet is the testing phase of any product where the Performance and Bugs in the products are founded then a pure and more efficient version of product is launched for the community called Alpha Product. You can also say that Main product Testnet can have 1 or more phases as to test different things out there.

Many others have already replied to the traditional meaning of testnets as it pertains to blockchains. Take into account that testnets (or demo accounts) are also used by exchanges to offer a risk-free way to experiment with their trading services. We clarified this part here -> https://www.thecryptobreakdown.com/guides/bybit-testnet

That is partly incorrect.

You can not create or alter things on Testnet. You might be able to build an application or token on top of them, but you cannot change the underlying system, it will follows the protocol. Developers are more likely to test performance or quickly debug the system if they implement a new feature via Regtest, Regtest gives them more flexibility since it runs locally and does not require other node consensus.

A testnet is a term for a blockchain that is being used for testing purposes. Anyone can create a testnet by starting up a new blockchain. Tesnet useful for testing things like smart contracts and DApps before putting them on the mainnet.

So, it is a separate network from the main Ethereum network that allows you to test software and smart contracts without spending real Ether (ETH).

Testnet is called Test Network. In testnet, users can use Blockchain after launching in the market because New Blockchain have many bugs and issue. Developor decide to test the Blockchain and it solve out problems. Users can use test it's Blockchain and return it will get reward when its mainnet will be launch.