Homework on Blockchain and Mining Visually - Questions

Blockchain and Bitcoin 101
#945
  1. For security, if any of the previous links will be broken, all the links after that will be broken too and all the links have to be solved again.
  2. The TX hash, the inputs and the outputs.
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#946

  1. It prevents the changes in the blockchain. Thus, ensuring Data Immutability.

  2. Block consists of Hash of previous Tx, Current Input Tx, Nuance.

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#947

Thank you for clarifying .

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#948

  1. It is important because it ensures that nothing can be changed in a mined block.

  2. A block contains the following: The hash of the previous block, list of current transactions, the nonce (random number).

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#949

  1. They need to be linked together in order to quickly monitored fake transactions. This link guarenties data immutability.

  2. In a block there is : header, block size, the previous block hash, the transactions and the nonce

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#950

  1. Why is it important that the blocks are cryptographically linked together?
    To ensure the security of the chain.
    That link is fixed and if changed in some way will collaps all the links between the blocks.

  2. What does the block structure looks like in bitcoin?
    It has transaction data, hash of the previous block, current block hash and the nonce

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#951
  1. Why is it important that the blocks are cryptographically linked together?
    To make it so much work to try to change and cheat that it becomes impossible.
  2. What does the block structure look like in bitcoin?

The hash of the block (transactions + hash of the previous block) + the nonce.

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#952
  1. Because in that way, anu change will affect all the blockchain.
  2. A header (with the block number, block hash, previous blok hash, nonce, etc…) and the body (all transactions in the block).
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#953

  1. Why is it important that the blocks are cryptographically linked together?
    So that they are immutable and unhackable. This is due to every new hash having part of the previous hash. This way we are able to tell if the block has been tampered with.

  2. What does the block structure look like in bitcoin?
    It has the previous hash, transactions, nonce, blockheader and current target. All data needed to audit any given block.

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#954
  1. Why is it important that the blocks are cryptographically linked together?

It is important for security and tracking that the blocks are all linked together. It ensures no double spend.

2. What does the block structure look like in bitcoin?

The Structure of a Bitcoin block consists of:

  • The Number of the block
  • The Nonce
  • List of transactions
  • Hash of the previous block
  • Hash of the block
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#955
  1. For the security of the block chain, a single breech will be felt by the entire blockchain.

2.- Block number

  • Nonce
    -Transaction data
  • Previous hash
    -Final Hash

View link: ( https://academy.ivanontech.com/products/blockchain-bitcoin-101/categories/1690108/posts/5675354 )

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#956

  1. Blocks are linked together, this secures the whole blockchain and makes cheating very difficult, almost impossible.

  2. Block structure in bitcoin looks like the following:
    Hash of previous block + the list of all transactions + The nonce

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#957
  1. It is important, so nobody can change previous transactions.
  2. Previous hash
    Transactions
    Nonce
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#958

The cryptographic link is Important because the mechanism providing security gives trustlessness and mustn’t be trivial.

The block structure is the nonce, transactions, and previous block hash.

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#959
  1. Why is it important that the blocks are cryptographically linked together?

This is how integrity of the block chain networks are connected. Each block in the chain is identical to the next block providing security as no transactions can be changed and only added to the chain. Otherwise, it would break the link in the chain to the block

  1. What does the block structure look like in bitcoin?

The block structure consists of the previous blocks, list of transactions, and the nonce.

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#960
  1. So that a change in one effects all the rest. Also, I think something about how its much easier to figure out a the end number of a chain by guessing sequentially than by just guessing the final number in a series. Read that in that article at the top of this category of vids, though. Not in the lecture I think.
  2. Like a chain?
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#961
  1. oh yeah, previous hash, transactions (data) and nonce.
1 Like
#962

1 That way it is assured that changes to previous block are highly difficult (impossible).
2 Block number, nonce, Transactions, previous hash and current hast.

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#963

  1. so there is concensus and cant be tampered.

  2. Prevous hash, Data or transactions, Nounce

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#964
  1. for the security of the network ,so it immutable
  2. 1 mb of size. block header- previous block hash, mining competition, merkle tree root. block identifiers Merkle Trees
1 Like