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by Yoshifumi Nishida #11 01/14/2003

Q1 from ITB

• Acknowledgment and Retransmission
  
  
  • TCP sends back "Acknowledgment packet" (ACK) as it receives data packets
    
    
    • Notifies the sender of the packet arrival
      
      
    • Sender retransmits a packet if ACK does not arrive within a certain period.