Bitcoin Nodes
There are “full” and lightweight clients in the Bitcoin network. A Bitcoin Node is a full client, which means that it holds a blockchain and processes blocks and transactions in the system. Any computer, either mining or just running a Bitcoin client supports the chosen node and the system in general. The stakeholders can support the preferred node by running the corresponding software.
Bitcoin Core
Bitcoin Core is a BTC client formerly known as Bitcoin-Qt. Its developer Wladimir J. van der Laan used the initial reference code introduced by Satoshi Nakamoto, the creator of the first cryptocurrency. Bitcoin Core became the third BTC client and merged with the version 0.5 of the bitcoind. Name change followed in the version 0.9.0. According to the main goals of stable Bitcoin network, the client validates transactions in the blockchain, prevents double spending and contributes to the secure decentralized ecosystem.
Bitcoin Classic
Bitcoin Classic is a fork of Bitcoin Core with a larger BTC block size. It contributes to a healthier and more capable network. The block size limit is increased to 2 MB and the developers claim that they are up for an update if the Bitcoin community wishes for more. The software is adoptable to their needs. Larger blocks make the network more stable and serve as a stronger protection against double spending of the digital currency. Miners and businesses who adopt Bitcoin are welcome to switch to Bitcoin Classic.
Bitcoin XT
Bitcoin XT is the first fork of Bitcoin to support bigger block size. Its developers Mike Hearn and Gavin Andresen decided upon it to comply with the main principles of the major cryptocurrency. Bitcoin XT node supports more transactions, although the blockchain size is larger, it can be increased up to 8 MB. BTC transactions are assembled into blocks every 10 minutes and the reason for this is the continuous development of the currency.
Bitcoin Unlimited
The distinctive feature of Bitcoin Unlimited client is freedom for all members of the Bitcoin system to have a say about the block size. It tracks and selects the most used blockchain ignoring the block size. At the same time, the adopters have a possibility to choose a cap for the blocks they consider redundantly large.
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