In a true blockchain, only the protocol exists. The protocol is the set of rules that govern how the network operates. There is no central authority that can make decisions about how the network should function. The protocol is what allows the network to be decentralized and distributed.
Other related questions:
Q: Which protocol is used in blockchain?
A: The blockchain protocol is a decentralized protocol that enables secure, trustless and tamper-proof transactions on a distributed ledger.
Q: How many blockchain protocols exist?
A: At the time of writing, there are at least dozens of blockchain protocols in existence, with more likely to be created in the future. Some of the more notable protocols include Bitcoin, Ethereum, Ripple, and Stellar.
Q: What is true blockchain?
A: There is no one answer to this question as blockchain technology is still in its early stages and is constantly evolving. However, one common definition of blockchain is a distributed database that allows for secure, transparent and tamper-proof record-keeping.
Q: What blockchain networks exist?
Basic Attention Token