Which protocol provides reliable communication using acknowledgements?

TCP (Transmission Control Protocol) is a connection-based protocol that provides reliable communication. It uses acknowledgements to make sure data is delivered correctly and in order.


UDP: Faster but doesn check if data is received
IP: Handles addressing, not reliability
FTP: Uses TCP underneath,... Read More

1 COMPUTER NETWORKING MCQS

Which protocol provides reliable communication using acknowledgements?

  • UDP
  • IP
  • TCP
  • FTP
Correct Answer: C. TCP

Detailed Explanation

TCP (Transmission Control Protocol) is a connection-based protocol that provides reliable communication. It uses acknowledgements to make sure data is delivered correctly and in order.


  • UDP: Faster but doesn check if data is received

  • IP: Handles addressing, not reliability

  • FTP: Uses TCP underneath, but is not the protocol providing acknowledgements itself



TCP checks for errors and resends lost data. This makes it reliable, which is why its used in web browsing, emails, and file transfers.

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