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Network (Model (OSI (Layer System), TCP/IP), Consensus (Two Phases Commit…

- - - - Def:Masking despite error
      - Method:
        
        Atomic Operation
        
        Logging and recovery
    - - Liveness
        
        no failure and both commit, action commit
        
        If failure, conclude ASAP
      - Safetyness
        
        If one commit, no one aborts
        
        If one aborts, no one aborts
  - - - Agreement on some actions with failures
    - - Strawman Protocol
      - Server Termination Protocol
    - - Recovery Protocol
        
        Write ahead log
    - - Safety:
      - Liveness:
- - - - Lamport Clock
      - Vector Clock
      - Currency
  - - - Round Trip Time