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There are numerous blockchains out there, each with its own unique features and purposes. Over 5,000 blockchain projects have been launched, according to a report by CoinMarketCap.
These blockchains can be broadly categorized into two main types: public and private. Public blockchains, like Bitcoin and Ethereum, are open-source and allow anyone to join and participate, while private blockchains are restricted to a specific group of users.
One notable example of a public blockchain is Ethereum, which has its own programming language, Solidity, and a vast ecosystem of decentralized applications (dApps).
Blockchain Types
There are many types of blockchains, each with its own unique characteristics. Public blockchains, for example, are open to anyone, while private blockchains are restricted to authorized users.
Private blockchains are often used by organizations with specific needs. Permissioned blockchains, on the other hand, have different levels of user permissions or roles.
Permissioned blockchains can be customized to suit various business needs. They offer advantages such as allowing anyone to join the network after identity verification and giving special permissions to perform specific activities.
Blockchain-as-a-Service (BaaS) is a type of permissioned blockchain designed to be scalable for businesses. It reduces costs for companies that want to use blockchain technology in their processes.
Public blockchain networks often use Proof of Work (PoW) or Proof of Stake (PoS) consensus mechanisms. Private and permissioned blockchains, however, can be structured in various ways to prioritize speed, security, and scalability.
The choice of consensus mechanism plays a key role in securing the blockchain network from malicious actors. Different blockchains use different consensus mechanisms to achieve this goal.
Blockchain Overview
Blockchain technology is a decentralized, digital ledger that records transactions across a network of computers. It's a way to store and share data securely and transparently.
Blockchain was first proposed in 2008 by an individual or group of individuals using the pseudonym Satoshi Nakamoto. They created the Bitcoin protocol, which is the first and most well-known blockchain.
The blockchain is made up of blocks, which are groups of transactions that are linked together through complex algorithms. Each block contains a unique code, called a "hash", that connects it to the previous block.
A blockchain network is maintained by a group of nodes, or computers, that work together to validate and add new blocks. This process is called "mining", and it requires powerful computers to solve complex mathematical problems.
There are many different types of blockchains, including public, private, and consortium blockchains. Public blockchains, like Bitcoin, are open to anyone, while private blockchains are restricted to a specific group of users.
Blockchain Networks
There are many blockchain networks, each with its own unique features and purposes. The most popular one is the Bitcoin blockchain, which accounts for nearly 40% of the entire cryptocurrency world's value.
Bitcoin is followed closely by the Ethereum blockchain, which has surpassed Bitcoin in the number of transactions in 2021. Ethereum is the foundation network for many cryptocurrencies and NFTs, making it the most popular blockchain network.
The Solana blockchain is another widely used network, known for its fast transaction processing speed of tens of thousands of transactions per second. This is a significant advantage over Bitcoin, which supports only 7 transactions per second.
The Dogecoin blockchain is also notable, handling transactions about 10 times faster than the Bitcoin blockchain. Chia's blockchain network uses a unique consensus mechanism called "Nakamoto", which consumes significantly less energy than Bitcoin and Ethereum.
Ripple's XRP Ledger blockchain was created to support instant money transfers worldwide, while the Monero blockchain prioritizes privacy with extra features to obscure transaction information.
Blockchain Development
Blockchain development is a rapidly evolving field, driven by a continuous drive for innovation and improvement.
Developers experiment with different consensus mechanisms, leading to the creation of various blockchain projects.
Blockchain technology is still relatively new, and this drive for innovation is one of the key reasons why there are many blockchains today.
Developers and researchers also experiment with governance models, security features, and interoperability solutions, further expanding the possibilities of blockchain technology.
The constant push for innovation and improvement means that new blockchain projects are being developed all the time, making it difficult to give an exact number of blockchains that exist.
Blockchain Governance
Blockchain governance is a crucial aspect of any blockchain, ensuring that the network is secure, decentralized, and fair.
Most blockchains use a consensus mechanism to validate transactions and create new blocks, but the way this is done can vary greatly.
For example, Bitcoin uses a proof-of-work (PoW) consensus mechanism, where miners compete to solve complex mathematical puzzles to validate transactions.
In contrast, Ethereum uses a proof-of-stake (PoS) consensus mechanism, where validators stake their own cryptocurrency to participate in the validation process.
The choice of consensus mechanism can have a significant impact on the governance of a blockchain, with some being more decentralized and secure than others.
A good governance system should prioritize transparency, accountability, and fairness, ensuring that all stakeholders have a say in the decision-making process.
For instance, some blockchains have implemented decentralized autonomous organizations (DAOs) to make decisions and govern the network.
Blockchain Landscape
The blockchain landscape is vast and diverse, with over a thousand active blockchains in the Web3, crypto, and NFT universe.
Bitcoin is the most popular blockchain, accounting for nearly 40% of the entire cryptocurrency world's value, but Ethereum is also a strong contender, with a total number of transactions surpassing Bitcoin's in 2021.
The Solana blockchain is rapidly growing in popularity due to its unique Proof of History consensus mechanism, which allows the network to process tens of thousands of transactions per second.
Dogecoin's blockchain handles transactions about 10 times faster than Bitcoin's, making it a serious player in the cryptocurrency world.
The Chia blockchain network uses a consensus mechanism called "Nakamoto", which consumes significantly less energy than Bitcoin and Ethereum.
Ripple's XRP Ledger blockchain was created to support instant money transfers worldwide, both in crypto and fiat currencies.
The Monero blockchain prioritizes privacy, encrypting personally identifiable information and obscuring all transaction details.
Zelcore supports over 70 blockchains, allowing users to explore and interact with digital assets, dApps, and other components from a single platform.
There are multiple blockchains because a little diversification and competition creates a digital world where Web3 explorers can have their needs met in the best ways possible.
Each blockchain can be sorted into four primary categories: public, private, hybrid, or consortium, with lots of subcategories based on their purpose or primary function.
Sources
- https://www.investopedia.com/news/public-private-permissioned-blockchains-compared/
- https://en.wikipedia.org/wiki/List_of_blockchains
- https://www.gemini.com/cryptopedia/blockchain-types-pow-pos-private
- https://medium.zelcore.io/why-are-there-so-many-blockchains-decoding-digital-diversity-91c5ddb4de07
- https://kriptomat.io/blockchain/most-popular-blockchain-networks/
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