Blockchain II

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  1. Blockchain (def'n Wikipedia)
    distributed database that is used to maintain a continuously growing list of records, called blocks. Each block contains a timestamp and a link to a previous block.
  2. A blockchain is typically managed by a _____?___ network collectively adhering to a protocol for validating new blocks.
    peer-to-peer 
  3. By design, blockchains are inherently resistant to ____?____ .
    A. modification of the data
    B. man in the middle attacks
    C. accidental writes
    D. all of the above
    A.
    (this multiple choice question has been scrambled)
  4. A blockchain facilitates secure online __?__

    A. phishing attacks
    B. reading and writing of files
    C. transactions
    D. gaming.
    C.
    (this multiple choice question has been scrambled)
  5. A blockchain is a ___?____ and ____?___ that is used to record transactions across many computers so that the record cannot be altered retroactively without the alteration of all subsequent blocks and the collusion of the network.

    A. random and unpredictable fileset
    B. real time atomic and secure digital counter
    C. secure and digital ledger
    D. decentralized and distributed digital ledger
    D.
    (this multiple choice question has been scrambled)
  6. Decentralized blockchains may use ___?___ and ___?___.

    A. ad-hoc message passing and distributed networking
    B. decentralized cores and Bluetooth
    C. a priori message passing and centralized core distribution
    D. ad-hoc chicken fingers and crusty french bread
    A.
    (this multiple choice question has been scrambled)
  7. Distributed networking (def'n)
    a network system, is described as this when the computer programming and the data to be worked on are spread out across more than one computer.
  8. Hard fork (def'n)
    This type of term refers to a situation when a blockchain splits into two separate chains in consequence of the use of two distinct sets of rules trying to govern the system.
  9. Smart contracts (def'n)
    These are contracts that can be partially or fully executed or enforced without human interaction.
  10. Cryptocurrency (def'n)
    A digital asset designed to work as a medium of exchange using cryptography to secure the transactions and to control the creation of additional units of the currency.
  11. Mining (def'n)
    is a record-keeping service.Miners keep the blockchain consistent, complete, and unalterable by repeatedly verifying and collecting newly broadcast transactions into a new group of transactions called a block.
  12. In order to be accepted by the rest of the network, a new block must contain a so-called ___?___.

    A. proof-of-work
    B. proof-of-insurance
    C. blank check
    D. SHA1 Hash
    A.
    (this multiple choice question has been scrambled)
  13. Proof-of-work (def'n)
    This is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester, usually meaning processing time by a computer.
  14. Give an example of proof-of-work
    partial hash inversions to prove that work was done, as a good-will token to send an e-mail.
  15. There are two classes of proof-of-work protocols...What are their names?
    • Challenge-response
    • Solution-verification
  16. Solution-verification proof-of-work (def'n)
    This proof-of-work class has no direct interactive link; the problem must be self-imposed before a solution is sought by the requester, and the provider must check both the problem choice and the found solution.
  17. Challenge-response  proof-of-work (def'n)
    This proof-of-work class assume a direct interactive link between the requester (client) and the provider (server). The provider chooses a challenge, say an item in a set with a property, the requester finds the relevant response in the set, which is sent back and checked by the provider.

Card Set Information

Author:
geschw66
ID:
332577
Filename:
Blockchain II
Updated:
2017-06-27 22:46:22
Tags:
blockchain computer science database
Folders:

Description:
More block chain terms, some the same with slightly different definitions than the first set of cards. Source for this set of cards was Wikipedia.
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