What is the physical location of Blockchain?

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Hello everyone i am new in this technology and i am confused please clear my few doubts. Thanks in advance.

  1. Blockchain consist of Blocks but where these blocks are stored, i mean what is the physical location of Blocks.
  2. As per my theoretical knowledge blockchain exist in network but in which network, do we need to create our own network or is there any third party those who provide network for our application.
  3. Suppose i have to develop land registry application i need some space somewhere where i can store my blocks. if i store all block in my system itself then how it will behave like a decentralized.
  4. Does Ethereum stored our blocks in his network?
  5. Blockchain itself is a database but how we can manage the data.
  6. Does BigchainDB stored our blocks or blockchain in his database?
blockchain ethereum database
1 Answers
  1. Blockchain is shared among all the p2p network hosting it. So basically blockchain is stored in many simple HDD all around the world.
  2. If you want to create a totally new blockchain, you create your own network. If you want, for example, to use Ethereum network to run your token, then you'll use Ethereum network (which has been created for Ethereum at the first place)
  3. That's what the blockchain and it's protocol do. Store datas in multiple places and handle the integrity and safety of the datas. You need to have multiple agents in your network to be decentralized. You alone is centralized.
  4. Yes, or more exactly, Ethereum users store datas in their storages for the Ethereum network
  5. You can imagine different form of blockchain, but speaking about the first one, Bitcoin, when the p2p network is launched and used, you can't manage datas by yourself. The network will handle it, and the only way you can manage datas is by having more than 50% of the mining power (in an other way the network let users manage datas in an normal use case, for exemple, send your bitcoin is a normal use case, steal someone is not)
  6. Sorry, I never heard about it =/

To others: Feel free to modify my answer as you please, I'm not an expert, just trying to share and perfect my knowledge

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